1-11 Exercise 3: Prefix of a string

Question

1.9k 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 | 1.9k 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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}

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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    j=strlen(a);
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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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**     * *****  ***    * **  * 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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*  * * *** *   *   *    *  *   i,j,prefix = 1; 
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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);
*  * ** *  * ** *   **  ***** len = strlen(a);
  **    **      * ** *       **  ** = 0 ; i < len ; i++)
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**  ** ** ***  **  *  ** *** **    ** *  * **    
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  *** *  *  * *    *  *    ** ** *    ** *  ****    *  *  * *     ** * * *   *    *   ** ****   * is not a prefix of %s",a,b);
* **  *** ** *  * * ***    * *   *   *  ** ** **    * ********** **** * **  * *   *   **
* *****  ***  *  ***  * ***     *  * **    ** *       ***

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 * **   ** *   **          **   == 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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