0 like 0 dislike
7.2k 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 | 7.2k views
0 0
12345

27 Answers

0 like 0 dislike
Hidden content!
#include *** *** * **
#include *** ** ****

char prefix(char s1[], char s2[])
 {
 int i;
 int length;
 int count=0;
 
*** * **** * * * * *** **
 
*** ** *** * ** * ** * * * ****** **
**** * * * * ***
** * * * * * ************ ** * ******** * * == s2[i])
*** **** * **** * **** * ******** ** ** *** **
* * *** * *** * ** *** ** * ** ** * *** * ** ******** ***
*** ** *** * **** ** * ** **** * ** ** *
 
*** * ***** *** ** * * *
 
* * **** ** * **** ** ** **** * *** * * == length)
** ** **** **** * * ***
** ** ** * **************** ** * ******* ******** *** ** ** ** * **** is a prefix of %s",s1,s2);
** *** ** * * * * * *
 
* *** * ** * * * ** ** *
* * * ** *** *** * * * * * *
* * ** ***** **** ** * * * ** ******** *** ******* **** ** ** is not a prefix of %s",s1,s2);
* * *** ** ** *** * * * * * **
 return 0;
** ** ****** ***** *** ***
 }

int main(void)
{
*** ** ** * * * **** s1[100];
***** * * ** ** * * ** s2[100];
* ** * ** * * * * *** * * i,j;
* * *** ** *** ** *
* * * **** *** * * ** *** ** ** **** s1);
* * **** ****** * **** * * * * * s2);
***** * ** ****** * * *
** * * * * ** *** ** * ****
** ** * * *** ** *
* * * ****** ** * * * * 0;
}
answered by (-193 points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include * ** * * * * *
#include ** *** * ***

int prefix (char st1[],char st2[]){
**** * * ** * * * * len=0, i, cnt=0;
*** * * * * * * * *
** ** ** * = (unsigned)strlen(st1);
******** ******* ** * ** *
* * * **** **** * ** * (i=0;i<len;i++)
*** * * *** ***** ** **
* *** ** * * (st1[i]==st2[i]){
******* * ** * * * * * *** * * ** ** ******** * ***** * *** ******
*** * ** * * *** * ** * * **** *
*** * ** * ** **** *
*** * * ******* ** * * (cnt == len){
******** ** ** **** *** ***** * *** * * * ** 1;
** * ** ** ** * * ** **
* ***** * * * * ** * **
** ** ** * * *** ** 0;
* ** **** * * **
}

int main(void) {
** ** * ** ** * st1[256];
** * * * * **** * ** st2[256];
* ** ** *** * *** * ** * * * *** * * **** st1);
*** **** ***** ** * * * ** * * * ** * ** st2);

* ** * ** ****** (prefix(st1,st2)){
** ** **** * * ** * ** * * * ******** ***** *** is a prefix of %s", st1, st2);
* ** * ** ** **
*** * ** * *** * * ***
* *** * * * ** ** * *** * ** ** ** * ******* *** * ** is not a prefix of %s", st1, st2);

**** ** *** *** ** ***** * 0;
}
answered by (323 points)
0 0
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()
{
    int i,j;
    char a[100], b[100];
* * ** * * *** ** * * ** ** ***
    scanf("%s",b);
    j=strlen(a);
    for(i=0;i<j;i++)
** * ** * ** * * * * * * **** * ** ** * *
** * * ** * ***** ** ** * **** ** * * ******** *** * * **** *** * * *
* *** ** ** ***** *** * * * * ***** ** * ** * * * * ** * ** ** ***** **
* * ** ** ** * * *** * *** *** ** * *** * * ** * * * * * * ** ** * * ** * * * *** ** ** * * **** * * * is not a prefix of %s",a,b);
* * ** * * ** * ** * ** *** ** * ** **** ****** **** ** * ** ** ** ** * * * ** * * **** * *** * * * * * * **
** *** ** * *** * * * * ** ** * ** * * * * ** * ** *** ********* ** ** **** ** ***
* * * * * * * * * ** *** *** * ** * * *** ******* *** ** * * ** *
* * ** **** *** * * * **** ** ** * *** * * ** * ** ** * **** ****** ** ** **
* * * ** ** * * * * ******* * *** * *** * ** **** * ** ** ** ** *** ** * * ** ** ** * ** * * * * ** *** is a prefix of %s",a,b);
* * *** ***** * * * * ***** * ** * * ** * * * **** * * * * * * * *** * ** * ** *** * * *
**** ** *** * * ** * * * * *** * ** * * ** * *** ** ** * * * *** * * * * * **
*** * *** ** *** * * * * * * ** * ****** * *** *




}
answered by (-301 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: Wrong output
Case 2: Correct output
0 like 0 dislike
Hidden content!
#include<stdio.h>
#include<string.h>

int main(void)
{
    char pre[100], str[100];
    int i;
* *** **** * * * **** ***** **
** ***** * ** * ** ** * ** * * *** **

**** * *** * * * * ****** *** * * ** * **** *** * * * ** ** * ** 0)
* * ** * ** ** ** *** * ** ** ** ** * ** * ** * * * * *** **
* * * * *** * * * * *** * * ** ****** ** ** ** * *** ** * * * *** ** * * *** *** ** * ** * * ***** is a prefix of %s",pre,str);
* *** ** *** ** **** *** * * * * * ** * **** *** ** ** ** *
** * * ***** * * * * *** * * **** * *** **** *
** * ** * * ** * ** * ** * **** * * * ********* * * *** * * * * **
** * * ** * * * * **** * ** ***** **** * *** ***** * * * * * * ** *** **** * *** * * * is not a prefix of %s",pre,str);
* * * * * ** *** ** ** * * ** ** * ** ** * * * * * * **

**** ***** * ** * 0;
}
answered by (-281 points)
edited by
0 0
Case 0: Wrong output
Case 1: Correct 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: 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
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 like 0 dislike
Hidden content!
#include <stdio.h>
#include <string.h>

int main()
{
****** ** * ** * * * * a[100];

** **** * * * * **** ** ** b[100];

******* * ** * * * * i = 0;

* *** * *** * * * * prefix = 1;

* * *** * * * * * ***** ***** * * a, b);

**** * ** ** ** **** ** *** len = strlen(a);

*** ** * * *** * ** * ** = 0; i < len; i++)
*** ** ** *** ** * * *
* * * *** * * *** * * * * ** * *** *** * ** * * * ** != b[i])
** * ** ** ****** *** * * ** **** * *
*** ** ** ** * * ** *** **** * *** ** *** ** * * * * * ** = 0;

* **** * * * **** * **** * * * **** * * * * ***** * * * * * * *** * is not a prefix of %s", a, b);

* * * * ***** * * *** * ** * ** ** ***** ** * ** **
**** * * *** ****** ****** * * * *******
*** * ** * ** * ****
* * ** ** ** * * * * == 1)
** * *** * **** * * * *
***** * * * ***** ** ** * *** **** * ***** is a prefix of %s", a, b);

* ** ** *** **** * *
}
answered by (-285 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct 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 * * * ***
#include * *** * * ***

int main()
{
* * * * * ***** *** ** a[100],b[100];
* * ** * * * *** * i,j,prefix = 1;
** ***** * *** * ** * * * * %s",a,b);
** * ***** * *** * * * len = strlen(a);
* * **** * * *** ** * ** = 0 ; i < len ; i++)
**** **** * * * * *
* * * ***** * * * *** *** **** * * ******** ** != b[i])
** * * ** ***** * * **** * ** *
* * ** ** ** * * ***** ** ** ** * ** * ** ** * ** * = 0;
** *** ** *** ** ** ******* * * * ** **** ** * * * *** * * * * * * ** ****** * * is not a prefix of %s",a,b);
* ** * * **** * *** * **** * ** * * * ******** *** *** * ****** *
**** ** ** * * * * *** ** * * * * ** ****** *** *

**** * * * * * ***
* ** **** * ** * *** == 1)
*** *** ** * * *** ***** * * ** * * * * * * ******* is a prefix of %s",a,b);

 
* * * * **** **** **** ** 0;
}
answered by (-127 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
prog.c: In function 'main':
prog.c:8:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%s %s",a,b);
     ^~~~~
prog.c:8:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:15:13: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
             printf("%s is not a prefix of %s",a,b);
             ^~~~~~
prog.c:15:13: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:15:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:21:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("%s is a prefix of %s",a,b);
         ^~~~~~
prog.c:21:9: note: include '<stdio.h>' or provide a declaration of 'printf'
0 0
prog.c: In function 'main':
prog.c:9:11: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     int n=strlen(a);
           ^~~~~~
prog.c:9:11: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:9:11: note: include '<string.h>' or provide a declaration of 'strlen'
0 0
prog.c: In function 'main':
prog.c:9:11: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     int n=strlen(a);
           ^~~~~~
prog.c:9:11: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:9:11: note: include '<string.h>' or provide a declaration of 'strlen'
0 0
prog.c: In function 'main':
prog.c:8:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%s %s",a,b);
     ^~~~~
prog.c:8:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:15:13: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
             printf("%s is not a prefix of %s",a,b);
             ^~~~~~
prog.c:15:13: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:15:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:21:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("%s is a prefix of %s",a,b);
         ^~~~~~
prog.c:21:9: note: include '<stdio.h>' or provide a declaration of 'printf'
0 like 0 dislike
Hidden content!
#include <stdio.h>
#include ** * *
#include *** **** **

int main()
{
* * * * ** *** * ** ** a[100],b[100];
* ****** * * * **** * * * i,j,prefix = 1;
* * ** * ****** * * * ** * ** **** %s",a,b);
* ** ** * * ** * ** ** * len = strlen(a);
*** *** * **** *** ** = 0 ; i < len ; i++)
* * * * **** ***** * * * *
* * ***** * ** * *** * *** *** * * * * *** != b[i])
* * *** *** * ** ** * * * * ***** *** * * **
** *** ** ** * ******* * *** ** * *** * * *** * *** *** * ** * = 0;
* * * ** ** * ** * * * ** ** * * **** * * ** * *** * ** * ** ** ** * is not a prefix of %s",a,b);
***** *** * ** *** * * * *** ** * * **** * * ** * * * *** ** ** *
* *** * *** * ** * * ** ** **** *****

* * *** * * * * * * * **
** ****** * ** * *** ** *** * == 1)
*** * * * ** * *** * ********* **** ** * **** * * is a prefix of %s",a,b);


* * ***** * * * ** * 0;
}
answered by (-255 points)
edited by
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct 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 * * * ** *
#include * * *

int prefix(const char *pre, const char *str)
{

** ** ** * * * * *** * * *** ** ** *
** * **** * ** **** * ** ** ** * **** * 0;
* * ***** * ***** * ****** ***** *** * *
* *** * * ** *** *** * * **** * * *** ** ** 1;
** *** * ** * * ** *** return 0;


}

int main()
{
* *** ** ** ** * *** * pre[100],str[100];
* *** ** * ** ***
* *** * * ** *** ** ** * * *** **
*** * * ** * * **** ** ** *
** * ** ** * * * ** ********** ** * ** *** **** is a prefix of %s",pre,str);
** ** * ***** *** ** **
* * **** * *** * ** * *** * ** ***** * * * is not a prefix of %s",pre,str);
*** ********** ** * 0;
}
answered by (-196 points)
edited by
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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
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 perfix(char *a,char *b){
******* ** ** * **** c;
****** ** ** *** ** ** ** ** * *
*** * *** * * ** ** ** * * ** * ** * 0;
* * * *** ** * ***
* * * **** *** * *** ****
* ** * * * * ******** ** * ******* *** ** ** * * *** **** ** ** ** * *** of a string
****** ** *** *** * ** **** * *** ***** *** * * * *** ** * **** * * ** *
***** ** * * ***** *** *** *** ***** **** ** ************** **** ***** * *** * * ******* 0;
* * *** ** *** * *** * ** *** **
* ** **** **** * * * ** * *** *** * * ** *** * 1;
    }
}

int main(){
** * ** *** *** *** ** a[100],b[100];
*** * *** ** ** **** *** ***** * * ** %s",a,b);
** * ** ** * *** * * * * *
**** **** ** ** * ** ***** ** * * * * * * ***** *** *** * is a prefix of %s",a,b);
* *** ***** * ** * **
* *** *** * * ** *** * ****** * * * * * * * ** is not a prefix of %s",a,b);
*** ** **** *** **** * ** 0;
}
answered by (-498 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: Correct output
Case 2: Correct output
0 0
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[100],s[100],a[100]={};
* * * ***** * ** * * * * t;
* ** * * * * ***** * *** *** **
* ***** * ** * ** ** * * * * ** **** ** *
** * * * **** * *** * * %s",p,s);
*** * * ** * ** ** * *
** * ** ** *** ** **** *** * ** ***
* * ******* * * * *****
* * ** ** * * * * ***** ** ** ***
**** * * ** * ** ******* ***
*** * ***** * * * * * *** * *** **** ********** ** is a prefix of %s",p,s);
** ****** * ** * *
****** *** * * * ** *** * ** *
** **** *** * ** **** ** ** ** ****** * * *** * is not a prefix of %s",p,s);
** ** *** ** **
** * ** * ***** ** ** *** ** 0;
}
answered by (54 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
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.69.59.171
©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
| 10.5k 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
| 6.9k 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
| 9.6k views
12,783 questions
183,442 answers
172,219 comments
4,824 users