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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**** ** ** ****   * ** * *** * == b[i]){
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if (cnt == n){
   * ****** ** **** ** **  **       **    **    *   ** 1;
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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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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)
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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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  *** **** ** *  * *   * ***
   *** ** *  * * *** * * **   **    *   **** *** * **  *  **   ****  * *      **   

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