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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#include <stdio.h>
#include <string.h>

int main(){
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}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
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}
answered by (-284 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 %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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    }


}
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)
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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>
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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];

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

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 ******   *  *    *  ** * **    ** **
     * * *  **** *   * ** *  *   **   **    * * **    **  * *   is not a prefix of %s", a, b);
*  ** ** *  *  ***  **** *   *** 
**  **  **   ** ***  * * 
  ** * *  **  ***   *** * 
* **     * ** ****   **   ** ** *    *    *  *   * *  *** * **   *** 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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