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

int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

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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()
{
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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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    }


}
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)
0 0
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)
{

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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 ()
{
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 * **  ***   *   * ***       ***** 0;
}
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Hidden content!
#include <stdio.h>
#include    *    ***  ***     
#include **   **  ** * *

int main()
{
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 * **  *   ** ***     *** *  * ** *  b[100];

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  *****  *    ***** *   *  len_a = strlen(a);

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

* *** ***  **  *******  ** * == 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]={};
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  **   * * * *      *    **  ** ** **
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* **   *** * ** *   *   ** 
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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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 **  ****** ***  ******  * **  * *   ** **  *  *  *   ** **  *     ***  **    *    *  *  *  **  ** *   * * ** * ** * * *   ****** ***  ***  *  * * 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;
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 * ***   ***        *  *  ** ***   *   *  ***    ******  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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