Final Exam 2 (20%)

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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

 

[Exam] asked in Final Exam
ID: 42299 - Available when: 2018-01-17 14:00 - Due to: Unlimited
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37 Answers

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

int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

n= *** *****  

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

int main()
{
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}
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Hidden content!
#include <stdio.h>
#include <string.h>

int main(){
  *  * **  **** *******  ***  c;
 * * **  *** ******  *  * ** ** a[100],b[100];
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***   *****  * * * ***   ** ****    *    *    ***** *  *  0;
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    }
 ***  **  * *** *  **  * * *      0;
}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
**   ******   *  * *** **  **  * n,count;
* *****     **    * ***     * * * *    **  
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  * *  *  *   ** *  **   *   *
**    ** ***    **   * ** ** *  0;
}
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prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s %s",&prefix,&word);
             ^
prog.c:8:16: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s %s",&prefix,&word);
                ^
prog.c:10:15: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(i=0;i<strlen(prefix);++i)
               ^~~~~~
prog.c:10:15: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:10:15: note: include '<string.h>' or provide a declaration of 'strlen'
prog.c:18:6: error: expected '(' before 'printf'
      printf("%s is a prefix of %s",prefix,word);
      ^~~~~~
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Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{
 * *****   *****      **  a[100],b[100];
*   **  *** * *** * **   ** **  **** **********  *  ** 
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    }
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*  *  *  ***** *  **     * * ** *   ***  *  ***** *** *   ***    is a prefix of %s",a,b);


    }


}
answered by (-329 points)
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prog.c: In function 'main':
prog.c:5:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:5:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
prog.c:7:8: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     l1=strlen(a);
        ^~~~~~
prog.c:7:8: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:7:8: note: include '<string.h>' or provide a declaration of 'strlen'
commented by (4.3k points)
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prog.c: In function 'main':
prog.c:6:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:6:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
commented by (4.3k points)
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Hidden content!
#include<stdio.h>
* * *  * **  **  *  * **
int main(void)
{

 * ******    *  * *      * pre[100];
*    ** * * *** *  ***  **   ** word[100];
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***    *  **  *  ** ** *  ** *       * *** ***   *   * 

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printf("%s is a prefix of %s",pre,word);
return 0;
}
answered by (-249 points)
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prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&pre);
             ^
prog.c:9:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&word);
             ^
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&pre);
             ^
prog.c:9:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&word);
             ^
commented by (4.3k points)
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Hidden content!
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main ()
{
 ******  *** **   * **** *  pre [100],a[100];
    ** ***  ***    * ** **   n ,i;
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*     **     * * *     *  ** ******
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**   ** ***  * **   *** *****  **  *  ****** * *   ***  
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 *****  *   **** **   * ** *** ** *  *   *  **     ***  * * ** **  *  * *     **** *  ****** is a prefix of %s",pre,a);
***** ***  *** *   **** **     ****   *   **   *  *****   * * * ** * *   *  *** 
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    * **   * ****   ****** *
****  ** **** *     * * * *  * **** * * * * ** * *  * ***  * ***   **   * *   * *

  ****   *      ** **  ***  ** * 0;
}
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Hidden content!
#include <stdio.h>
#include *  *** *  *****
#include ** ** * * **    

int main()
{
* * * *    * *    ****   **   a[100];

 *  * *  *  ******* ***    *  b[100];

  ** ** *  **  *  **   **  *     *      %s", a, b);

**  ** **  **   ** **    ** len_a = strlen(a);

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

 ** ***  *** * **  *   * * **  flag = 1;

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

  * ********     *  * *  ** *  == 0)
*     * ** ** * *  *   * * 
*** *** * *    * *     *  *****  *  **  ** ****** * *  * * *  *** ** is not a prefix of %s", a, b);
*  *   **    *** *   * * *    
**  **  *  *  * ** *****  *****
*     *****    * ** ***  
*   * * **  * **  ** *  * *     * **** ** *  * **********    * * is a prefix of %s", a, b);
** * **   *   * *     **   
** ** ****     ***** ** ****   * * 0;
}
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Hidden content!
#include<stdio.h>
  * *     * **  *****
int main()
{
   **  *     * **   * *****  * i,n;
     * ****** ** *   **     *  p[100],s[100],a[100]={};
** *   *    * ****   **  ** * **  **  * **  %s",p,s);
 ****    ***   ****   **** * **  *
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*    * *  * *  *   * ** ** ** * * *** ****    * ***  *
*  ** ** *  ******** **    *  *   *   **
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  *  *  **  * ****  ****      
*        * **    ****  ***  *    
*  **** ** *   ** ** *  * * **   *  * ** *   ** * **  ***  * ***** ** ******* is not a prefix of %s",p,s);
* *****   *  ***    *    ** ***
** * * ** *** * *   *      *** **  **  *** ****     * * *
         *  *    *  *** * *** 0;
}
answered by (54 points)
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Hidden content!
#include<stdio.h>
#include<string.h>

int main()
{
    int i;
    char a[100];
    char b[100];
   *****    *    * * * * *    *     **   *   ** *     
    scanf("%s",b);
    for(i=0;i<strlen(a);i++)
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*      ** ** **   *****   **      ***  * * *****     *  ***    ***** **     **** * **  != b[i])
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     * * *** * ** ***  ***  * * *    **    *  **   *  * **** ***   *   *  *   * **  * **  ***  * * **  * *  
**  ***** *   * *** ** **      *  ***  * ***   * * ****  ** *** * *   ** *    * ** * ****  == b[strlen(a)-1])
*  **   **  ** ****  ** **    *   *  *** * ** **** *  **  *   * *** *  ***** *** ****  **  * * * *  *
** *  * ********  * *****  * ** *  **  ****** ******     * *      * * ** **  ***    *  ** *  *  *  *** * * ** * ** * * * ***** ** **    ***        is a prefix of %s",a,b);
*  *    *  **    * *  * ***  *  *   **  ** *   ****   *** *  * **** *       **** **       * * ***** **** *****   *    *    **  *    *
* **  ****    ** **      *** ***   *  * * * ** * * *** **  ***      *  * *    ***** ****   **  ** ****
* *****  **  * **   *  **  ***** ******   ****  **  
}
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Hidden content!
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define n 100

int aa(char a[],char b[]){
    ***  *   *  * **    *  *  *       i;
    **   *    * ****  * **  **    (a[0]!=b[0]){
** * **  *  **  * * *  * * ***  ** *****      ** * *   0;
   * ***   * *   ** **  * ** *** *  
***** * *** *   **** ***  ** **   ***  **   ** 
 * *  *** * *   *  * * ***  * * **** * * ***** * * *  * **** ** ** a[i]==b[i])
 * * * * *   ******* **  ** *** ****  ***  *** *     * **
  *    * ***** *  * *   * *  * *  * ****** *** ** **  * * ***** ***  ***   **  * 1;
 *      *  *  **  ****    ** ** * *** *** *  **    *****      ** * ***** * * * * * *** 
* **   *  * *  ** **  * *******   * **    **  ****  * 
*    ** ** * *****   *  * ******  *****  
*  * * *  *   ** *   * *   ****     *  0;

}

int main(){
  *  ***  ** **   **** *  *  c[n],d[n],e[n];
  *    **  *    **** **  *** * * **  i;
 *      *   * ***  ***    * ** *** **  ** %s",c,d);

***   * **   * * **   **   * *  **** 
  * * ***** * *  * ** ** * * ********* * *** ** ** *  **  ** **   *   is a prefix of %s",c,d);

 ** *     ***     **    ** ***
 * **    ** * *  **   *** ****  * * * **  ******  *          ** is not a prefix of %s",c,d);


}
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