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 | 10.7k views

27 Answers

Page:

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

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

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()
{
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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)
{

**  *   *   *****   **  *        ** **    *  **
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    * ******    **  **  * **  * 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;
* ** ** **** ** **   **
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***   ** *   *   *    ** *** **** *    *   * *   * * 
* ** *  ****  ** *   *** * * ****  * **    **  *   **  1;
    }
}

int main(){
*   * *     *** *     * * *  a[100],b[100];
  **  ** *****   ***  * ****  * ***** %s",a,b);
*   ****  * * *****  **  * *   *  *  * **
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   *    *** *     ***  * ** *
   **** *  *      *  * ****  * *  *** *  *  ** * * *   *** *  *  *   ** 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;
* **   ** *** *** ** *     **   **  ***  *
   ***** ** ***** **  ***  ****** *     
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***  ***** ** **   * **  * * * **  
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  **  ** *  *** * ******* ***  *  **     ** *** * * *     **   ** 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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