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;

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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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}
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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'
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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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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 ()
{
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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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 ***  * ********** *  **  **  * flag = 1;

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