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()
{
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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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**  * **** ** *  ** *  *    *      0;
}
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Hidden content!
#include <stdio.h>
#include ** **  *** * * 
#include  ** *  ****  **    

int main()
{
 **  ***  *** ***  ***** a[100];

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   *  **  *** *    **  ** * 
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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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* *  * ****  ** * *    
********* *  * ** ** *  * ** ****    *  ***  ** *   **   *  
**    **   **  * * ***** 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];
   * ***  ** *  *  **  * * **   * ****    ** ** 
    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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 ** **  **    ******   * *  *    **    ***  ***  
 *  * ***** *  *** **  *  ** **  **  **  ** * ****** *  **  * ***** ** *     * *    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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