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

int main(){
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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()
{
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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>
   ** **  * * * *  ** 
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)
0 0
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);

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