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     * ***  * *
*    **      **    * * 
**    * *   * *  ****  *  

int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

n= ** * * *** 

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}

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

int main(){
* *  * * **     * *** ** c;
***  **    ** * ***    *  ** ***   a[100],b[100];
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    }
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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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* *    **     ******* *   **   * *  * ** * * ** **  ***   ** *  ** is a prefix of %s",a,b);


    }


}
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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)
{

* ****    ** ** * *  * *    * pre[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];

** * ******** **  ** * ***** *  ** ***   *  %s", a, b);

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

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*** *  * * * *** **   **     ***  flag = 1;

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* *****  * * *  * ** *  ****  ****  ****   *** 
** **   * ***   **   *   ***

**   *  **  ** **  ***  * ***  == 0)
***** * * *** ******     *
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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]={};
 * *    ***       * **** *     * * *    *** %s",p,s);
 * * ** ****   ***** ***   **   ** * 
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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);
    for(i=0;i<strlen(a);i++)
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  *   *  * ****   *  * **  * *********** *   *** ** * **  ** ***   * *     **    ** * *** ***   * ** *
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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]){
 * *   * * ***  ********* * *       ******  *   ***** *  0;
* ** ** * ****  * ** ******    * * *
***   * **  ** *** ***** *    ** *** ***  ***
 **  * ** * *  ******  ***     **  ***   ** ****     *                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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