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

   **   ** ** *  ****   ** ****   ***
 ****     **** * *  **   **   * * == b[i]){
* * ** *    ** *    ******* ** * ** * **** * * *   * *    *
 **  **  *  *  * **********   * * 

 ***  **    *  * **  
if (cnt == n){
   **  **       ** *** ***** *** ** *   *  *   * *       1;
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* ** *   *******  ****** * *
**   *******  *  ***  * *  ** *   * ** **     ********  * *  **  0;

}

int main()
{
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* *  ***      **** * ** i,j;

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* *** * ***  *  *     **   * **********  **  **  ***   * ***  *   * *      **   is not a prefix of %s", s1,s2);



}
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Hidden content!
#include <stdio.h>
#include <string.h>

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


    }


}
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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];
     *   *  * **   *** *****  ** **  ***  %s",pre,word);
 ****  ** *  **  * **  ** *   * ** *  ***  * 
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** ***   * *  * **   **** * **     * *********** * ** * * ***    * *  *** ****    * *      0;
*     * ***   ***   ** * **  ** ** **    ****  *  *** **

* * ***** *  *****  **** ** 
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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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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*  **  * ****** ** *   *  **     ** **** **  ** *  ** *   ***  **    *    *  *   *            *** ** *  is a prefix of %s",pre,a);
*** *  *   **** ****  *   *   *   *    **     *    *   **     *** **   *****  *  * **   
   ** **  * * *  * *    **   *********  *  *    *    ***    *   *    * ** **        ***** **   **  *     * *  *  is not a prefix of %s",pre,a);return 0;
*   ** * ****  **   *     * ***
 *    * *****  * *   * **   **   * ***   ** ** * ****  * * ****  **   **     

  *     ** ** **   **   ****   * * 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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 *  *  *  *****  ** **   *  **  *    **** * ** *** * *** 
*  **** *              **  *  ***      *   *    *  * * ***  **  **       ***   ** *  = 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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  *** ****  * * ** ** **
 ** ** * *  ***   **   *  * * 
 *      * ***   **       *** ** * * **  *    **   ** ** ** *   **  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++)
     *    ***   *    *     * ***   ***   ******       *  **  
* ** ******  * * **  *** ** *** *  *** ** ** ** **  *    *  ****   **** **  ***    * * != 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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