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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}
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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()
{
* *******  *  * * **  * ** ** a[100],b[100];
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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);
               ^
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Hidden content!
#include<stdio.h>
 *   * *  * * *** * * **
int main(void)
{

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***    ***** *   **   *** **** 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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Hidden content!
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main ()
{
   * * ** ** *** * *** * *     pre [100],a[100];
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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];

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*      *  * * * ** ***

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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;
}
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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;
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 *  *     * *        *    ******** **  *  ** * * * 
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 *    ********   * **  *   * * **  **** ** **  * *    *     *****  *    * * ** *     
  * ** * *  * **** ******   **  ***  * **  *  * * ******
** *   **** * *    *   *  ** * 
 *  *  **     * * ** * * * * ** ** *  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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