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[]){
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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}
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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'
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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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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 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];
 *  **** *  ****    *   **   * * *** *  *    ***  
    scanf("%s",b);
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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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  *  *     **  * * *   ********** ** * ****    *   * *
 *   *** * ** *  **  **   * ***    * **        *******  * *  * **    *  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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