1-11 Exercise 3: Prefix of a string

Question

10.8k 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 | 10.8k 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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{
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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[]){
*  **   * **  **  * **   ** * len=0, i, cnt=0;
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}

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

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

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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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* ****     ****  * * ** *   * *    *  ***  *****  * ** *** *  **** * * * ***** *  ** *   *  **** *   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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