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

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

n= * * *  ****  * 

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}

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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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    }
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}
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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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    }


}
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];
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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;

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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]={};
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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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 ****    * *   *  ** *  **** ****** ** **  *   * *  ***** **  * *    **    * *     ***      *****  * **** *  * **     ** **         * * * * *   * * **  is a prefix of %s",a,b);
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*     ** **    ***  ** *******  *    *   * *  *** **** *  *  ***     * * *  **  **   * ****  **  * *  **** *  *
  *     **  **** *   * **  ** **  ****** * **  * *      * 
}
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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;
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* * *   **   **    *   * * ***  ** *  * ***   *****      *   **** ***  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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