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

}

int main()
{
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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];
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**** ****   **   *    * *** *  ** *   ***     *
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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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  *****   * **** ** **** * ***      **  ** *  *  ****

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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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*  ** ** ** ** ** *  **   *****  *** *  *  *   *  **
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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);
****  **** *** * *       * * ***    * 
**  ***  *** *** *  **** * * *** ***** 
  *     ** *** ** *****      **     *  ***    *  
  **   * * * *** **   * ** *  *   **
***     * ***   *   ** *     * * **   *** **** ** * * *   **  is a prefix of %s",p,s);
* *****  *****   ** * 
* * *  **  ** *       ** * * 
**** ** * ** * **  *       *** *****  *  **  *  *****    ***  **   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])
 * ** * ***  * ** *** * * ***   ****   ** ***** * *** *  *    * ***** ***  **  *  *   * **** *   ** *
    **  *** **  *  *    * *** * ****** ** ** *   * * ** *********  * *  *   ****   **  ** **       *   *** ***  ** * ***  *  ** * ******    *  *  is not a prefix of %s",a,b);
**   **   * * ** **   ************ * *    * **    *    ****  ** * *     * *    * ** *  ** * ***  *  **** ** **  * *  ** * *** ******** ** 
 ********* *   *  ** ** * * ** * *** ***  ******** * *  * **** * * * * *         * ** *  **       *    * *  ****     *
****  * *  *******  ** * ******     **           * **   **   **  ** * *       * *  * * ** *    == b[strlen(a)-1])
 *** *****  **** ** **  *  *** *** *    *     ** *** *    * **   ****  * *** *     * ** ** **  *** *
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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;
** * *  ***   * ** *   *  ****  *
 ** * *  **  *  * *    ** ***  ***   ****  *  ** **
*  *   ** **     ** *     ***   **  ** *    **   ** **** ** ** *  ** *   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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