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

int main(){
*   ***** **   *** ***** *** * **  c;
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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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    }


}
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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)
{

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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 ()
{
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 **  *  ******** * 
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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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*  * **  ***** * **  * * * 
* **   * ******    **** **
* ***  ****   *     * **   
    *** *   ** **  *        ******* **********    *****  **    ** 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;
}
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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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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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**  **** ******* ***      *** **   *  ***  **  * ** *   ** ** ***  ***  ****     **
   ** *    ** *     *     **  *   **   * *  ** *
****** ***   * *  * ******  * *   ** *
* ***  *** **    * **        ** **** 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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