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

int main(){
 ** ****  * *    * ****   * *** *  c;
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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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}
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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()
{
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    }


}
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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'
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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);
               ^
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Hidden content!
#include<stdio.h>
 **  **  *   * *    ***
int main(void)
{

 **  *   ** * ***  * ***  *  *  pre[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];

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  **  *     ** **** ** * *     
    ** **  *** *    ***    *****
*** *  *       *    ***  *  
* *  *  *  * ****  *  *     * * ***    * *     * ****** *  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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*    **** ****** ** ** *  
  ***  ***  * * **  **      *    * *  *   *   * *  * * *    ** *
*  *****   *    *** ** **    *  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];
 *  ***** * * ** ** *    **** ** ****   * ***
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    for(i=0;i<strlen(a);i++)
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 * * * **   *   **    **  **  * ** *****   * ** **  *   ***   ***   ****   *      ***** **  **** * * * *   **
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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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