1-11 Exercise 3: Prefix of a string

Question

13.6k 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 | 13.6k views

27 Answers

Page:

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

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

char prefix(char s1[], char s2[])
 {
 int i;
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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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}

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

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;

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

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

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

*   *   * ** *** ** * * *** = 0; i < len; i++)
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* *     ** *  *******  ** * ***** **    *****    ***** * 
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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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 * * *  ** ** **  **   **   **      **** **   * *  * ** 

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

 
 *** * *         *  ** *  *** *** 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);
*  *  **** *** **   *    ** len = strlen(a);
* **  *       *   **** * * = 0 ; i < len ; i++)
*******   **    * **   **  
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*** *  *    ** ********  ****  * ***     *    *   *  
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  *  **  * *      *    *** *** ****  * * *** ***** ********       * * * **    * **  *  * *   * is not a prefix of %s",a,b);
  * ***  **   * ***  *  * ** ** *** *  *   **  ** ** ***    ***    *  **    *     * *  *   **
* * **  *   ***  *   *  ** * ** *  *  **   **  *  * * *

* ****  * ***   * * *** **
* * *  *   *    * *      ** ***  * == 1)
   *        *    * ** * ***** *  * *** *   *  *   ** ** *   *** **  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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