1-11 Exercise 3: Prefix of a string

Question

12.5k 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 Jan 11, 2018 in Chapter 13: Strings by thopd (12.1k points)
ID: 41439 - Available when: Unlimited - Due to: Unlimited
edited Jan 11, 2018 by semicolon | 12.5k views

27 Answers

Page:

Diyiel · Answer 1 · 2018-01-13 00:58:32

Hidden content!
#include ****   **  *** 
#include * ***  ***    * 

char prefix(char s1[], char s2[])
 {
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answered Jan 13, 2018 by Diyiel (-193 points)

Stephen Richards · Answer 2 · 2018-01-13 00:46:20

Hidden content!
#include   *      *   *
#include **    *   * * * *

int prefix (char st1[],char st2[]){
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}

answered Jan 13, 2018 by Stephen Richards (323 points)

ryan · Answer 3 · 2018-01-11 22:07:28

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

int main()
{
    int i,j;
    char a[100], b[100];
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answered Jan 11, 2018 by ryan (-301 points)

Headshake · Answer 4 · 2018-01-11 21:22:34

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

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

answered Jan 11, 2018 by Headshake (-281 points)
edited Jan 13, 2018 by Headshake

Sabrina Lin · Answer 5 · 2018-01-11 21:03:22

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

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

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

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}

answered Jan 11, 2018 by Sabrina Lin (-285 points)
edited Jan 11, 2018 by Sabrina Lin

watty1998871108 · Answer 6 · 2018-01-11 21:00:46

Hidden content!
#include * ** ** * ** 
#include   *  *     *  * 

int main() 
{ 
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**  *  * ***    ** * **   *  0; 
}

answered Jan 11, 2018 by watty1998871108 (-127 points)
edited Jan 17, 2018 by watty1998871108

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'

commented Jan 17, 2018 by The Judge (4.3k points)

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'

commented Jan 17, 2018 by The Judge (4.3k points)

Sammi0208 · Answer 7 · 2018-01-11 21:00:08

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

int main()
{
** *  * ***  * **  *      a[100],b[100];
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 * ***  * *  ***    ***** * *  ** * * 0;
}

answered Jan 11, 2018 by Sammi0208 (-255 points)
edited Jan 11, 2018 by Sammi0208

410530022 · Answer 8 · 2018-01-11 20:46:02

Hidden content!
#include ** ****** *   * * 
#include  ***   *** ******  * 

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

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


}

int main()
{
 ***   *  *  *     *    **  *  pre[100],str[100];
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 * *  ** *    *** *        ** *  *** *  *** ** 
**** *  * *** **    ** * *    * * *  
*   *   ** *  *  ** * ********* ** *   *  * * * ***    **   * *  is a prefix of %s",pre,str);
* *  *   *  *  *** **  *      
 ***** **  ** *** *  **** * ** **** **   *  ** *  ** **** *   * *  ***** is not a prefix of %s",pre,str);
*****    *  * * * *   ***  *  *** 0;
}

answered Jan 11, 2018 by 410530022 (-196 points)
edited Jan 11, 2018 by 410530022

LinJingYao · Answer 9 · 2018-01-11 20:28:50

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

int perfix(char *a,char *b){
  ****** * * * * * *****  **** c;
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       ** ** * *  **   *  *  * ***   ** ** *    *   *    * ** * * 0;
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    }
}

int main(){
 **    *  *  *       ** ** **** a[100],b[100];
 *   ** * *****  *    *     * * *  ** * %s",a,b);
*** * *  **   ** * *  **       ******** *
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 *  * * ***  * * ** *   *** *   *  
    * *  *    **  * * *  **   * * ****   ** ** **  *** ***  ***  is not a prefix of %s",a,b);
*  * **    * ***   ***** ** 0;
}

answered Jan 11, 2018 by LinJingYao (-498 points)
edited Jan 17, 2018 by LinJingYao

VincentXV · Answer 10 · 2018-01-11 20:05:37

Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
 ** * ** ** * *   *   *  **** p[100],s[100],a[100]={};
*  ** ***    ********  *** t;
* ** ***  **   *   *    *****      *****    * 
*** ** *     *    * *  * * **   * *  * *  
*** * **   *** *    **  ******  *      * %s",p,s);
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***  ** *    * *    *   ** ** **   *
 **      *****  * *  * *** *    *** ***     **  **   *
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 * * * ****   * *  * *  ** ***
 **   *** *   *    ***   **   * *
*** * *  * **   ** **    ****   * *** *  **** * * *** ******  *   ****  is not a prefix of %s",p,s);
 * ********  ** *   * * 
 * *  * ***  * ** ** * ***    0;
}

answered Jan 11, 2018 by VincentXV (54 points)

1-11 Exercise 3: Prefix of a string

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