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(){
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}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
* * * ***   * *    **    n,count;
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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)
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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)
{

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

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

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

*    *** *  *     *  *  *      b[100];

* * * **  *  ***** *    * * *    %s", a, b);

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

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