1-11 Exercise 3: Prefix of a string

Question

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 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 | 7.2k 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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* *   **  *** * *** *  ****    * prefix = 1;

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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];
*   *   **  **  ***  * *     * i,j,prefix = 1;
 *  **  **** ** ******   **  *****     * * %s",a,b);
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*  *   * *   *  ********** ******  *       *    ****** **   **  *  * *   *** * *     **  *** * *  is not a prefix of %s",a,b);
***** *  ** ** *  * ** *  * *  **  * ** *  **** *  *  ***** ** ** * *    * * * ** ***** ** * 
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*   * ** *   ** **   ***** **    **       *      ** **   *  *     * *  is a prefix of %s",a,b);


 *   *    ** **  ** * ** * *** ** 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];
** *** ***  ****   * * ** **
* * **  ** *  *   * ** * *  *****  ***  *  *
 ***   ** *  *** * * *  **   *** *    *** 
   ***   *** **  *** *   ** ** *    *** * *  *    ** * *    ***     **   * 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;
   ** * * **    * **       **  ***  * **  ********* *
     ** ** *  *   *   * *    *      ** *  ** *  **      * *      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 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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 *    *   **  * ** *     * *  
  * ***** * * * *   ****  ** * *   *   *
  * *  *   *   ** ********  *  ** ***  **** *** *
   **  * *** *       **  *  * ** **   *   
* **** *** * ***   * **  ** ** * * **  * ** *****  * *** **  * **** ** is a prefix of %s",p,s);
  ******   **** * **   **
* * ** **  **  *        **  * 
  ***  *** * **   * **** ***   *  *   **** ** *   **  *  * *    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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