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

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**  **  *    ** ****  * *   *  
   ** *  *  *  * ***  ** ** *  *
* ***** **       **   *     
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  ***    ** *   *  *  **  * *
**  **     *   * * * * *    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;
}
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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;
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  ***** *    **  * ** ** **  ** *  * *** * ***  *** 
   * ***    *** ** *  *       **   *    *    *  *** **  * *    **   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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