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 *   *  *      *
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int prefix(char a[], char b[]){
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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()
{
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    }


}
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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];

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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]){
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*   *** ***   *      **** ***  *  *    * * **** ***** ** * * * ***      **  ** * **** 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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