3 like 0 dislike
3.9k views
迴文判斷

迴文是指一個字串從前面讀過去跟從後面讀過去是一樣的

所以 abcdcba 是一個迴文

請寫一個程式判斷書入的字串是不是迴文

輸入說明:

會輸入一個字串,字串中間不會包含空白字元

輸出說明:

如果輸入的字串是迴文,請輸出YES,反之則輸出NO

輸入範例:

abcdcba

輸出範例:

YES
[Exercise] Coding (C) - asked in 2017-1 程式設計(一)AD by (18k points)
ID: 33757 - Available when: Unlimited - Due to: Unlimited
| 3.9k views

22 Answers

0 like 0 dislike
Hidden content!
**** ***** * **** ****
* ** * ** ** * * ****
** *
int ***
{
** * ** char ** = *
* ***
* **** * * ** * **** ****** *** a);
* ** *** int x = **** **
**** *
* * * **** int i,
** * * ******* for(i = 0; i * x / 2 ; i++)
** * **** * {
** ** * * * * *** * * == a[x - i - 1])
** * ** * *** **** ** * ** *** * flag = 1;
* * ** * * * * * else
**** * ** * ** * ** {
* ** * ***** *** * **** ** ** * * *** * flag = 0;
* * * * *** * * ** ** * **** ** *
*** * ** **** *** }
* * ** ** }
* * *** * *** == 1? ** * *** * * * : ** * * ** *****
*
*** * * * *** ** 0;
}
answered by (236 points)
edited by
0 0
prog.c: In function 'main':
prog.c:7:4: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
  x=strlen(a);
    ^~~~~~
prog.c:7:4: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:7:4: note: include '<string.h>' or provide a declaration of 'strlen'
0 0
Case 0: Correct output
Case 1: Wrong output
0 0
Case 0: Correct output
Case 1: Wrong output
0 0
Case 0: Correct output
Case 1: Wrong output
0 0
prog.c: In function 'main':
prog.c:6:10: error: stray '\357' in program
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
          ^
prog.c:6:11: error: stray '\274' in program
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
           ^
prog.c:6:12: error: stray '\235' in program
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
            ^
prog.c:6:13: error: stray '\357' in program
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
             ^
prog.c:6:14: error: stray '\274' in program
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
              ^
prog.c:6:15: error: stray '\202' in program
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
               ^
prog.c:6:16: error: stray '\357' in program
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
                ^
prog.c:6:17: error: stray '\274' in program
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
                 ^
prog.c:6:18: error: stray '\202' in program
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
                  ^
prog.c:6:7: error: array size missing in 'a'
  char a[]\xef\xbc\x9d\xef\xbc\x82\xef\xbc\x82;
       ^
prog.c:11:23: error: stray '\357' in program
      for(j=x-1;i<j;j--\xef\xbc\x89
                       ^
prog.c:11:24: error: stray '\274' in program
      for(j=x-1;i<j;j--\xef\xbc\x89
                        ^
prog.c:11:25: error: stray '\211' in program
      for(j=x-1;i<j;j--\xef\xbc\x89
                         ^
prog.c:12:6: error: expected ')' before 'if'
      if(a[i]==a[j])
      ^~
prog.c:24:2: error: expected expression before '}' token
  }
  ^
0 0
prog.c: In function 'main':
prog.c:6:9: error: stray '\357' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
         ^
prog.c:6:10: error: stray '\274' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
          ^
prog.c:6:11: error: stray '\221' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
           ^
prog.c:6:12: error: stray '\357' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
            ^
prog.c:6:13: error: stray '\274' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
             ^
prog.c:6:14: error: stray '\220' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
              ^
prog.c:6:15: error: stray '\357' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
               ^
prog.c:6:16: error: stray '\274' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
                ^
prog.c:6:17: error: stray '\220' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
                 ^
prog.c:6:18: error: stray '\357' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
                  ^
prog.c:6:19: error: stray '\274' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
                   ^
prog.c:6:20: error: stray '\220' in program
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
                    ^
prog.c:6:7: error: array size missing in 'a'
  char a[\xef\xbc\x91\xef\xbc\x90\xef\xbc\x90\xef\xbc\x90];
       ^
prog.c:11:23: error: stray '\357' in program
      for(j=x-1;i<j;j--\xef\xbc\x89
                       ^
prog.c:11:24: error: stray '\274' in program
      for(j=x-1;i<j;j--\xef\xbc\x89
                        ^
prog.c:11:25: error: stray '\211' in program
      for(j=x-1;i<j;j--\xef\xbc\x89
                         ^
prog.c:12:6: error: expected ')' before 'if'
      if(a[i]==a[j])
      ^~
prog.c:24:2: error: expected expression before '}' token
  }
  ^
0 0
Case 0: Wrong output
Case 1: Wrong output
0 0
Case 0: Correct output
Case 1: Wrong output
0 0
Case 0: Correct output
Case 1: Correct output
0 like 0 dislike
Hidden content!
** * * ******** **
* ** * ***** **
int main()
{
* * * * * char a[100];
** **** * * * * * ** * *** **
* * ** * ** {
**** ** * ** **** * int * *
** * * * * * * * ** ** * * **
* ** * * *** * ** * * **** int test=y/2;
* ***** * **** * ** **** * *** *** *** ** ** **
* * * ** * * * *   {
***       ** *   **** **
* *** **     ** *** * * ** * ***** *** c++;
** *** ** ** * * ** * *** * * * ** ** *** * else
* **** ***** * ** ** * **** *** * *** * * * * * *** c=0;
* *** * ** * * * * * ** }
* * * ** *** * * * * ***
** * ** ** * ****** ** * * *** ****** * ***
** * * * ** * else
** *** *** * * * ** ** * * * * ** * * *
*** *** }
** * ** ** *** return 0;
}
answered by (100 points)
edited by
0 0
Case 0: Wrong output
Case 1: Wrong output
0 0
Case 0: Wrong output
Case 1: Correct output
0 0
Case 0: Wrong output
Case 1: Correct output
0 0
Case 0: Correct output
Case 1: Correct output
0 like 0 dislike
Hidden content!
#include ** * ** ** **
#include ** * *** **
 
 int is_palindrome(char *s)
 {
** * ** **** *** ** i, len;
*** *** *** *
*** * * ** = strlen(s);
***** * *** *
*** ** ** * ** *** = 0; i < (len /2); i++) {
** ** * **** * * * * **** (s[i] != s[len-i-1])
** * * ** **** * * *** *** * * * *** 0;
* ** **
****** ** ** ** *
* * * * * * * (i >= len/2)
* ***** ** * * *** ** * ** ** 1;
** * ** * ** *
*** *** ** ** ***** ****** * 0;
 }
 
 int main() {
*** * * **** * **** s[256];
* **** * * ** *
* ** ** *** ** {
**** * ** ** *** ** * *** *** * **
** *** ** * * ** * * *
** *** * **** **** ** ** (is_palindrome(s))
** * *** * * *** *** * **** * * ** * * **** * * ** s);
* *** * ********* *** * *
* ** * ** * ** * * ** * ** * *** * ** ** * * * * s);
* * * ** * ** *
* ** ** * ***** ***** *
answered by (212 points)
edited by
0 0
Case 0: Wrong output
Case 1: Wrong output
0 0
prog.c: In function 'main':
prog.c:25:6: warning: 'gets' is deprecated [-Wdeprecated-declarations]
      gets(s);
      ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:28:15: warning: too many arguments for format [-Wformat-extra-args]
        printf("Yes\n", s);
               ^~~~~~~
prog.c:30:15: warning: too many arguments for format [-Wformat-extra-args]
        printf("NO\n", s);
               ^~~~~~
/tmp/ccSNkWCs.o: In function `main':
prog.c:(.text+0xae): warning: the `gets' function is dangerous and should not be used.
0 like 0 dislike
Hidden content!
#include *** ****** * ** *
#include ** * **
int main()
{
* ** *** char ** ** ***
** ** * * ** * int i,j,z;
***** * * * ** * **** * * **
**** * * * i = *** * **
*** *** ** * for ( j=0; ** * *** ***** )
* * *** ** {
* ** * *   *** ** *** ** **   if(str[j] == str[i - 1])
* ** * * * ** ** * * ***** *** * * * * {
* * ** * * ** **** * *** **** z = 1;
* * *** * * **** ** ****** }
    * **** * *** **** ** str[j] != str[i - 1] )
***** **** ** * ** *** * * ** *
** *** ** ***     * * **** * ** ******** ** ** ** **
* *   *** * * *** ** * **** *** ***** = 0;
** ***   ** * ** * ** **** * *** * ** ** *****
* ** ** ** * * *** ** ** ** ** *** ** ***** * *
* ** * *** * * *
**** * * * if (z == 1)
** * ** **** ** * * ** *** *** * ** * *** *
* ****** * * **** **
* *** ** * * ** * * * 0;
}
answered by (209 points)
0 0
prog.c: In function 'main':
prog.c:7:2: warning: 'gets' is deprecated [-Wdeprecated-declarations]
  gets(str);
  ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccB79V4N.o: In function `main':
prog.c:(.text+0x3c): warning: the `gets' function is dangerous and should not be used.
0 0
prog.c: In function 'main':
prog.c:7:10: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[1000]' [-Wformat=]
  scanf("%s",&str);
          ^
0 like 0 dislike
Hidden content!
#include <stdio.h>
#include <string.h>
int main(){
******** *** * * ** ** s1[500];
* ** * * * ** ** * * * ** i,j;
******* ** ** **** * *** *** **** * * * * ***
* ** * * * ** ** ** k=strlen(s1);

** *** ** ** * **** * *** * ** * * *** *
* * ** ** *** * ** * ** *** ** * * * ****
* * * * ** * ** * * ** ** ** * ***** * *** * * * * * ** * * * ** *
* ** * ***** * ** **** ** * * ** * ** * * **** * * ** * ***** ******* ** * *
* * ** * *** * **** * **** *** * **
    }
*** ***** * * *** ****** ***
* * ** * *** * ** **** * ** ** **** * ** * * * * *
    }
** * ** * ** * * * * 0;
}
answered by (194 points)
edited by
0 0
prog.c: In function 'is_palindrome':
prog.c:6:10: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
    len = strlen(s);
          ^~~~~~
prog.c:6:10: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:6:10: note: include '<string.h>' or provide a declaration of 'strlen'
prog.c: In function 'main':
prog.c:22:6: warning: 'gets' is deprecated [-Wdeprecated-declarations]
      gets(s);
      ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccxt7lC3.o: In function `main':
prog.c:(.text+0xae): warning: the `gets' function is dangerous and should not be used.
0 0
Case 0: Wrong output
Case 1: Wrong output
0 like 0 dislike
Hidden content!
#include <stdio.h>
#define N 20


int Cycle(char *s);


int main()
{
**** * * * **** **** * s[N];

* * *** *** ****** **** * * ** *
** ** ** * * ** * ** * * ** * ** *** * ** * **** input word\n");
**** ********** * *** * * * ** * *** *** ** ** * * ** * ******** * ** ***

** *** * * ** *** **** * ** ** * * == '^'){
* ** *** * ** ** **** ** **** * *** ***** * ** * * **** * *** ** * **
* ** *** * ** *** *** * * * * *** ** * * ** *** *

*** * ** * * * * * **** ***** ** *** *** * ** *
** ** *** * * ** * * **** * ** ** * ** * ** * ** * * ** * * ** *** yes!\n",s);
** **** ** ** ********* ** * * * * * * *** ***
* ** * *** ** * * * * ** ** * * ** * * * *** * *** * * * * no!\n",s);
* * ** *** ** *** ** * ***** ** ** **
    }

** * ** *** **** * * * **** * 0;
}
int Cycle(char *s){
* * **** * ** ** * ** *h,*t;

* * * *** * * * * *** * * = s,t = s + strlen(s) - 1;t > h;h++,t--)
*** * * *** ** ****** ** * * * ** ** ** * * ** != *t) break;

***** * * ** ** ** * ***** t <= h;
}
answered by (190 points)
0 0
prog.c: In function 'main':
prog.c:14:17: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[20]' [-Wformat=]
         scanf("%s",&s);
                 ^
prog.c: In function 'Cycle':
prog.c:32:23: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(h = s,t = s + strlen(s) - 1;t > h;h++,t--)
                       ^~~~~~
prog.c:32:23: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:32:23: note: include '<string.h>' or provide a declaration of 'strlen'
0 like 0 dislike
Hidden content!
#include <stdio.h>


int main()
{
    char s[100];
    int i, j, n;
** * **** * * * *** * **** * ** * * ***
* ** * * * ** ** * ** * ******* * * *

* **** * * * * * * * * *
* ** * * * ** * *** ** * **** * ** * *
*** * ** * * ** ** * ** ** ** *** * * ***** * * ** break;
* ** *** ** ** * ** * * ** * **** ** *
* *** **** ** *** ****** ********* * ** * **** *** * ******** ***** * ** ** ******* *** * * **
** ** * ** *** *** * * ** * **** *** * *** *
* * ***** * * **** * ** **** * * * * * ** * ** ***** ** **** * * ** * *** * *** * *
* *** * * ******** * ** * * * * **** * * * * ** * ***** * * * * * 0;
}
answered by (174 points)
edited by
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'char *' [-Wformat=]
     scanf("%d",&s[n]);
             ^
prog.c:9:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(s);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:11:7: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     n=strlen(s);
       ^~~~~~
prog.c:11:7: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:11:7: note: include '<string.h>' or provide a declaration of 'strlen'
/tmp/ccDYUh1t.o: In function `main':
prog.c:(.text+0x3f): warning: the `gets' function is dangerous and should not be used.
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'char *' [-Wformat=]
     scanf("%d",&s[n]);
             ^
prog.c:9:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(s);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:11:7: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     n=strlen(s);
       ^~~~~~
prog.c:11:7: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:11:7: note: include '<string.h>' or provide a declaration of 'strlen'
/tmp/cc47s844.o: In function `main':
prog.c:(.text+0x3f): warning: the `gets' function is dangerous and should not be used.
0 0
prog.c: In function 'main':
prog.c:11:7: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     n=strlen(s);
       ^~~~~~
prog.c:11:7: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:11:7: note: include '<string.h>' or provide a declaration of 'strlen'
0 like 0 dislike
Hidden content!
#include <stdio.h>
#include<stdlib.h>

int main()
{
    char s[100];
    int i, j, n;
* ** *** ** * * *** ** *** *** ** ********* **
* * * * * *** **** * * *

** * ** * * * * ***
* * ****** ***** ******** * *** * * **** **
** * * ** * *** ***** * ** * * * * * ** break;
*** * ** * * ** *** * ** ****** * ***** *
** ** *** ** * * ** * * * * ***** *** * ** * * ** ***** * * *** * * **
* * ** * *** ****** * ** * ****** * *** **** * **
**** * ****** * * * * *** * * ** ** * ** *** * * *** * **** * ** *
}
answered by (174 points)
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'char *' [-Wformat=]
     scanf("%d",&s[n]);
             ^
prog.c:9:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(s);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:11:7: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     n=strlen(s);
       ^~~~~~
prog.c:11:7: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:11:7: note: include '<string.h>' or provide a declaration of 'strlen'
/tmp/ccjI8t0q.o: In function `main':
prog.c:(.text+0x3f): warning: the `gets' function is dangerous and should not be used.
0 like 0 dislike
Hidden content!
#include * * * *
#include ** * ***
*** * *
int is_palindrome(char *s) {
** * **** * ** i, len;
* * ** ** * * * ***
* * * * *** * * ** = strlen(s);
* *** * * **** ** *
*** * * ** * = 0; i < (len /2); i++) {
* *** ** * * ** *** (s[i] != s[len-i-1])
* * ** *** * ** ** ** *** * *** * 0;
* * * **** * * *
* ** **** ** ** *
* ****** ** *** **** (i >= len/2)
* * **** * ** ** ** ********* * 1;
* *** ** ** * *
**** * ** * * * * * * * **** 0;
}
  
int main() {
* * * * * ** ** s[256];
** ** * * **
*** *** *** * * * * * {
** *** * **** ** * ** **** *
* *** * * *** * ** **** * * *
* * ***** ** * ** *** (is_palindrome(s))
***** * * *** * * ** ** *** *** * * * * * * * *
* ******* ** * * * * *** *
* ** ** ** ****** * *** *** * * * * * * * * ***
***** * ***
}
answered by (160 points)
0 0
prog.c: In function 'main':
prog.c:24:6: warning: 'gets' is deprecated [-Wdeprecated-declarations]
      gets(s);
      ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/cc7oj25o.o: In function `main':
prog.c:(.text+0xae): warning: the `gets' function is dangerous and should not be used.
0 like 0 dislike
Hidden content!
** ** * * * *
* * * *** * *
int main()
{
***   char **
*** * ****** int a,b,c;
* *******
** ** * *** ** ** * * ** * * ** *** * EOF)
*** * *** * {
**** * *** ** * ** b = 1;
* ** * *** * * * * **** a = ** *
** ** * ** * * * *
* * * * * * * ** *** a/2;c++)
** **** * ** * ** * ** * * {
*** ** * * ** ** * *     * * ** * **
** * ***     ** *     {
*** * *     ** *** * ** ** * * **** * ** b=0;
*** * *** * **** *** * *** ** ** * *** * * * ** break;
** * * * * * * ** * ** ** }
*** * * * * *** ** ** *** }
** * * *** * if(b)
* * *** * * ** * **** * * * ********** * *** * ***** *
*** * * ** * * * else
****** * * ** ** * ** *** * * * **** * ** *** * * * * ** *
**** ** * * *** * *** ** * ***
* ** * * * * ** * * * * *** * * * break;
** * * ** * }
* * * **** * ** * ** **** ***
* * * ** return 0;
* ** * * * * ** *
* *
answered by (160 points)
0 0
prog.c: In function 'main':
prog.c:28:2: warning: implicit declaration of function 'system' [-Wimplicit-function-declaration]
  system("pause");
  ^~~~~~
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.71.255.87
©2016-2025

Related questions

2 like 0 dislike
24 answers
[Exercise] Coding (C) - asked Nov 16, 2017 in 2017-1 程式設計(一)AD by Shun-Po (18k points)
ID: 33762 - Available when: Unlimited - Due to: Unlimited
| 3.3k views
3 like 0 dislike
20 answers
[Exercise] Coding (C) - asked Nov 16, 2017 in 2017-1 程式設計(一)AD by Shun-Po (18k points)
ID: 33758 - Available when: Unlimited - Due to: Unlimited
| 3.5k views
3 like 0 dislike
9 answers
[Exercise] True/False - asked Nov 16, 2017 in 2017-1 程式設計(一)AD by 楊修俊 (30k points)
ID: 33763 - Available when: 2017-11-16 14:00 - Due to: 2017-11-16 14:30
| 757 views
3 like 0 dislike
5 answers
[Exercise] Coding (C) - asked Nov 30, 2017 in 2017-1 程式設計(一)AD by Shun-Po (18k points)
ID: 34978 - Available when: Unlimited - Due to: Unlimited
| 1.5k views
3 like 0 dislike
6 answers
[Exercise] Coding (C) - asked Nov 30, 2017 in 2017-1 程式設計(一)AD by Shun-Po (18k points)
ID: 34979 - Available when: Unlimited - Due to: Unlimited
| 1.4k views
12,783 questions
183,442 answers
172,219 comments
4,824 users