1-11 Exercise 3: Prefix of a string

Question

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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 | 9.9k 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];

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

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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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*  ***  ** ***** ** *  * 
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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);
    *  *** * *****    *** **      *
**** **  *  * *  ***       *   
 ****    *  *  ** * **   *    ** *
    **  ***  * *** ***   *  **  *** *   * * * 
 *** **     ** *  *  * *  *   ** * *  *  ***
* * ** *  ** *** *   *** *****  *   * *  * * * * * *** * ** ***  * *   ** 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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