[AD] 20171116 作業 1

Question

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

Answer 1

Hidden content!
******  * *  * * **  ** 
***   *       * *** * 
** * **
int ****
{
*   ***** * *   char   =   **
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*     **   *   **   ***  **  **   *** a);
* *****  ***   int x =   ***
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*** ****   *     for(i = 0; i  * *** x / 2 ; i++)
** *** **   **  *  {
**  **** * *   *    *** *       * **  == a[x - i - 1])
* ***   *  **    ***   * *    *****      *    flag = 1;
** **  *  * *    *  *  *   ***  else
 *   *    ** *  *  **  *  ***    {
*  ****   **  ** * **     * *  *   * *   ** *   ** flag = 0;
**   ***  *  * *  *  *   ***   * **     * *   * * 
 *  **  ** * ** * *  *   **   ******* }
****   *  * *  * }
 * *******     **         == 1?   * * **  *** *** :    ***   * **       
* **  *
  *   * *    *   *  * 0;
}

Comments

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'

---

Case 0: Correct output
Case 1: Wrong output

---

Case 0: Correct output
Case 1: Wrong output

---

Case 0: Correct output
Case 1: Wrong output

---

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
  }
  ^

---

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
  }
  ^

---

Case 0: Wrong output
Case 1: Wrong output

---

Case 0: Correct output
Case 1: Wrong output

---

Case 0: Correct output
Case 1: Correct output

Answer 2

Hidden content!
  ** * *  * *   *  * 
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int main()
{
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*  * *** * * **   **** **  ***  *  * * ** *  **   ***    
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** *  ****  *   ***  ** ** *  * **      * ** else
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* ****   * ***   ***  *  * ***  }
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** *****   ** * *   **  *     ***  * * *    ** *       ***      ***   ***
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   *     *      return 0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output

---

Case 0: Wrong output
Case 1: Correct output

---

Case 0: Wrong output
Case 1: Correct output

---

Case 0: Correct output
Case 1: Correct output

Answer 3

Hidden content!
#include     **   ** *  
#include ** ***** **  
 
 int is_palindrome(char *s) 
 {
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 }
 
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Comments

Case 0: Wrong output
Case 1: Wrong output

---

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.

Answer 4

Hidden content!
#include  *** *  ***   *   * 
#include ***    * **  
int main()
{
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*    ** *** **  * ** 
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}

Comments

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.

---

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);
          ^

Answer 5

Hidden content!
#include <stdio.h>
#include <string.h>
int main(){
 * * ****   **** **  ** ***       s1[500];
  *   **  ** *   * ***     ** **** i,j;
*** * *  ** * ***     *  ***  *   *    *    * ***
  * *   *** ** ** *  **** * k=strlen(s1);

  *** ** * * ***  ** ** * *      *  **** *** **  
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    }
*  * *   ***** *** *  * **   **  **
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    }
* ** ***** * *   ** ** * * *** * 0;
}

Comments

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.

---

Case 0: Wrong output
Case 1: Wrong output

Answer 6

Hidden content!
#include <stdio.h>
#define N 20


int Cycle(char *s);


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

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

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

   *  * ** * ***** * *    **** t <= h;
}

Comments

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'

Answer 7

Hidden content!
#include <stdio.h>


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

* * *     * *  *   * ** *    * 
*   * *** ** * * **   ***  * **  ** * **  * ***
****** * *   ** * **        *   ***  ** ***          *  * break;
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 *   *** ***  *  **  * * ** ** *     *  **  ** * *    * *** ** * * *     ******     ** ** * 0;
}

Comments

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.

---

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.

---

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'

Answer 8

Hidden content!
#include <stdio.h>
#include<stdlib.h>

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

*  * **** * *  *   *  **** ** *   **  
    **    * ** **  * ***  *  *****  **  * *   * 
*     *  *      *  ** **** *  * *     *** * * *  ***  **   ***** break;
*** *  **   * ** *  **  *  ** ***  *  * **  *  ***    **   * * *  **
   * *    ** *   *** **   * *** *  ** * *   * **  ** * ******  **    ** *    * *  ****  *  **  * * **  * 
*   ** *  *******    *  * ** *****  *  ** * * * * *  ***  *
***  *  *    *  * *  *   ******  *        ** * * **   ** *   ******  ** *       ***   ****
}

Comments

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.

Answer 9

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)) 
*     **  *** *****  **** * *  ***  ***  * * ** ** ***** *  ** **  
 *  * * ** * * *** ** ** *    * ***  
***   ** * ***        ***      **   * *   * *  *  *    *    **** 
    * * ** * *** * * 
}

Comments

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.

Answer 10

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;
    **         * ** * *
*****

Comments

prog.c: In function 'main':
prog.c:28:2: warning: implicit declaration of function 'system' [-Wimplicit-function-declaration]
  system("pause");
  ^~~~~~