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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Hidden content!
#include ***  * *   *    * *
#include  **     ** ** *  *
*  *  ** * *** ***  
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int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

n=   * ****  

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

* * * * * *     *** *    ** *   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);

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

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

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