0 like 0 dislike
9.1k views

A string p is a prefix of a string s if the leading characters of s are identical to p. For example, "abc" is a prefix of "abcde". Develop a function prefix that checks if a C string p is a prefix of another C string s.

p是s的前綴若s開頭的一段字串等於p。例如,"abc"是"abcde"的前綴。寫一個程式 判斷字串p是否字串s的前綴。

Example input 1:

abc
abcde

Example output 1:

abc is a prefix of abcde

 

Example input 2:

bc
abcde

Example output 2:

bc is not a prefix of abcde

 

[Exercise] Coding (C) - asked in Chapter 13: Strings by (12.1k points)
ID: 41439 - Available when: Unlimited - Due to: Unlimited

edited by | 9.1k views
0 0
12345

27 Answers

0 like 0 dislike
Hidden content!
#include <stdio.h>
#include <string.h>

int main()
{
* * * *** * ** * * n[999],str[999];
* **** ** * * * * * **** ** ** * n);
** * * * ** * * * * *** *** str);
* *** ** * * * ** * ** *** * ** * * * *******
********** **** * ** * ***** * **** * **** * ** *** **** * * **** * *** is a prefix of %s",n,str);
* **** * ** ****** * ** ** *** * *** * * * *
* ** ** ** * **** ** * ** *** **** **
* * * * * * ***** * ***** *** * * * *** * * * * * **** * *** is not a prefix of %s",n,str);
* * ** ** ***** * * ** ** **** * ***
*** * * ** * ** * ** ******* * 0;
}
answered by (-249 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
0 0
prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
* ** * **
* ** ** * ** *

int main()
{
****** **** ** * ** * * i,plen;
* * ** ** * *** * * * * **
* ** * ***** ** **** ***** * ** *** * * * * * *
*** ** ** *** * * * * * ** * *

* * * * * ** *** * *

* * **** * ** * * ** *** ** ******* i++)
*** ** *** * ** * ** *

* ** * ***
* *
*** * * * is not a prefix of * *****
return 0;

 }


if (i==plen-1)
* ** ** ** ** is a prefix of ** *

****** ** * * * *** ** * ** *


}
answered by (-336 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
#include<string.h>

int main() {
* *** * ** ** * * ***** p[1000],s[1000];
* * **** ** *** ** * * i=0,re=0,len;

*** * * * * * * * **** ****** p);
* * ******** * * * ** * * * * ** * s);
*** *** * ***** ** * *** * *** * * *

* * ** * ** *** ***** * * * {
* ** * * * **** * ******** ** ** * * **** ** * * *** {
** ** ** ** ** * ** * ** * ** *** ** * * ***** * * ** ** * * *
* * * * ** * * * **** ** * ** * * ** * * *** **** * * ***** * * ** **
* *** * * ***** ** * * * **** ** ** ** *** *
******** **** * ***
** ** ** * * *** * * ** {
** ***** * *** ** * **** *** * *** ***** *** is a prefix of %s", p, s);
***** **** ***** ** *
* ** ** * ***** ** * * if(re==1) {
***** ** ******* * ****** * **** *** * * *** *** *** is not a prefix of %s", p, s);
    }
}
answered by (-120 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{

*** * * * ** *** * ** a[100],b[100],c[100];
*** ******* * *** ***** ************* * *** ***
    int l1,l2,i=0;
* **** ** ** **** * * * ****
* * *** ** ** ** **** * **
* ** * *** * * * ** * ***
* * ** ***** **** * **** * ********* * *** * ** **** is not a prefix of %s",a,b);
    }
** *** ** * ** **** * if(l1<=l2){
* *** * *** *** *** * ** * * * prefix = 1;
** * * ** **** *** * ** * ** *** ** * *** * * *** * **** * *
*** ** * * *** * **** ** * * * * * *** ** ** * * ** * ** * * (a[i]!=b[i]){
*** * **** * *** ** ***** * ** *** * ** *** **** ** * ** * ** * * ** * * * ** ** *** *** *** * * is not a prefix of %s",a,b);
* * *** ** ** * * * *** * *** * * * * *** ** ******** ** **** ** * ** * * ** *** * = 0;
* * **** * * *** ** **** *** * ** ** * *** ** *** *** *** *** * * * ** ** * **
* ****** ** *** * ***** **** * * * ** **** ***** * *** *
*** *** * * ** * * * * ** ** * *** * ** * ***
** * * * ** *** * ** ** * * * * * ** ** ** * == 1){
** ** * * * **** **** ** * *** * * * ****** ****** ** *** ** is a prefix of %s",a,b);
* ****** * * * *** * *** ** * ******** **
    }
}
answered by (-329 points)
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:8:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
0 0
prog.c: In function 'main':
prog.c:7:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:7:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include * * **** * ***
#include * * ** ** *
#include * * *** *

int main()
{
****** *** * *** * **** ** prefix[100];
* ** *** ** **** * ** * word[100];
* * ** ** * * ******* ** * * %s", prefix, word);
** * ****** ** ** *** * i;
* * * * * * * * * = 0; i< strlen(prefix); ++i)
* * ** ** * * ** * * *
* * *** * ***** * * * * * * * ** *** * * * *** ** **** *
* * ** * * * ****** *** *** *** * * ** ** * *
** **** ** * * ** * ** **** * * * * * ** ** *** * ****** * ** ** * ** ** * is not a prefix of %s", prefix, word);
** ** *** * ** * * ** * **** ** * ** * * ******* * **** * * 0;
* ** * ** ** ** ** **** * * *** * ** ** ** *
* * ******* * * *
** ** ** ** ***** ** * is a prefix of %s", prefix, word);
* * ** ** * * *** ** 0;
}
answered
edited by
0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include * * * **
#include ***** ** * * **

int main(){
* **** * ** ** **** * * p[100],s[100];
* ** *** *** * * ** ** ** * * * * ** * **
** * * ** ***** * bf=1;
* * ** * * * ** **** *
* * * ** ** * * *** *** * * ** * * * * * * bf=0;
***** ** * * *** * ****

* * ** * * ** * * * *** ** **** * is a prefix of %s",p,s);
* * * ** * * *** * ***** * * * **** is not a prefix of * * * ***
* * * *** * ****** * 0;
}
answered by (-116 points)
0 0
prog.c: In function 'main':
prog.c:5:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(p);
     ^~~~
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:6:5: 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:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
/tmp/cclwPOj6.o: In function `main':
prog.c:(.text+0x26): warning: the `gets' function is dangerous and should not be used.
0 0
prog.c: In function 'main':
prog.c:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
#include<string.h>

int main()
{
*** * * * *** **** * i,count=0;
** * *** ** * * * ** * * string1[100];
* * * * ** ** ** ****** **** string2[100];
* *** * ** * ** * * * * *** ** * * * ***
* * * * * * * * * * ** ***** *

* * ** ** ** ** *** * ** **** * ** *
* **** * * ****** * * *
*** * * * ******* * * * * * * * * * ** * ** *** **
* * *** * * *** *** **** ** * * * *** ** *
**** * ********* * * *** * * * * * * * * ** *** **** **** **** * *****
**** ** * ** * * * ** * ** ** *** * *
    }
** **** * ** ** ****** * * *****
** ** * ** ** * * *
* ** * *** * * ** * * *** * ** *** ***** ** *** * * * ** is a prefix of %s",string1,string2);
* ** * *** * * * **
* **** * * * ** * *
* * ** * ** **
* * *** ** ** * *** * **** *** * ** * *********** is not a prefix of %s",string1,string2);
*** * * ** * * *
* * * * * * 0;
}
answered by (-323 points)
edited by
0 0
prog.c: In function 'main':
prog.c:9:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string1);
     ^~~~
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:10:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string2);
     ^~~~
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/ccIBxtbQ.o: In function `main':
prog.c:(.text+0x2f): warning: the `gets' function is dangerous and should not be used.
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.6.172
©2016-2025

Related questions

0 like 0 dislike
57 answers
[Exercise] Coding (C) - asked Jan 11, 2018 in Chapter 13: Strings
ID: 41431 - Available when: Unlimited - Due to: Unlimited
| 13.3k views
0 like 0 dislike
29 answers
[Exercise] Coding (C) - asked Jan 11, 2018 in Chapter 13: Strings by thopd (12.1k points)
ID: 41436 - Available when: Unlimited - Due to: Unlimited
| 9k views
0 like 0 dislike
53 answers
[Exercise] Coding (C) - asked Jan 4, 2018 in Chapter 13: Strings by semicolon (5.2k points)
ID: 40715 - Available when: 2018-01-04 18:00 - Due to: Unlimited
| 12.2k views
12,783 questions
183,442 answers
172,219 comments
4,824 users