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

int main(){
* *****  *  * * *  *   ** * c;
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    }
*  *   * *     * * ** * *** ***** 0;
}
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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: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'
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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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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 * *  * *** ****  *    * *    len_a = strlen(a);

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*** *  *  * ** ***  ***  * ****  *    *   *  *** *** * ****   *  * * *****    *  *  = 0;
* * *** ****       *      ** **  ***  * ** **   *  ***  *    
** ******    * * * **   *  

***  *****  *  * *   *  ** * * == 0)
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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]={};
*  * * * * **     *  *  *   ** ****   %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])
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* **  *  ** *** * ** ****      **  *  ****   *   ** * ** * ***** **    ***** **   *  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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