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;

n=  * *  **  * 

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

int main(){
** *  *    *   ** *  ** ***  **** c;
** *   *    *  ** ** *   * a[100],b[100];
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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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}
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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'
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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)
{

 *    **   **  *  *** *  *  * **   pre[100];
*  ****   * ******** * *  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];

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 **   ***  * *  * **  ** *   flag = 1;

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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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***  ***   *  * *  * **       *    * 
 ** * ** * *  * ****** ** * **  
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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];
*** **  **   **    **  *    *  ***  
    scanf("%s",b);
    for(i=0;i<strlen(a);i++)
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 * *  *   *    **  **   * **  *** *  **     **** * **        *    ***** *   * ****  ** != b[i])
 *** ***  *  *   **  *   **  *  ** *   *** ***     **   * ******  *** ***  ** *   ** **  ** **  * ****  *  ** * *
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 * **  * *** * ** *  *   *  * *  *  ***  ***       **  *** *    * *  *** * * * ** *** *** ***   **  ** *  ** **  * ** ** * * ****  **** ** 
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* *      **  **** *  ****    *** ***    ***  *** **           * *****  *  **  **  * * **   == b[strlen(a)-1])
   * ****** **     **   *  ****   **        *** *  *  * ** *******   *  *  ***  * **   *    * ****  * ***  **      ** 
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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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