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;

n=  **   **** * *** 

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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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    }
* *** * **  **   *  ***    *  0;
}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
**     *  ** **  * *  *  **  **  n,count;
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*  ****  ***** *** **     *
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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);


    }


}
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'
commented by (4.3k points)
0 0
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];
   ** *  ** **  * ** *    **** * word[100];
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printf("%s is a prefix of %s",pre,word);
return 0;
}
answered by (-249 points)
0 0
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)
0 0
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];
    *    *    **    ** *    *** ** n ,i;
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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;

    ***  ** ***   ********  = 0; i < len_a; i++)
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     **    *  ****    *     * *  **         *****
* **  *  *** * *   **  ******   *   * * **   *   ** ** **** *   ****** **  *** = 0;
 * * * * *   *  *     ** ** *  **  * ***  ****  
    *****    *   ****     *  * 

* ***** * ***     ***** *      **  == 0)
 **  **     ******  *  *  *   
*   *  *** *  * * *  *  ** **    **  **** * ****** *  **** *    * 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]={};
 *   **  * *    * **  ***  *  * * * ** * * %s",p,s);
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 *** **    ** **** *  *** ***    ** ***** *    *   *** 
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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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* *** ** * *  * ** ****    *** ** **  * *** * **  **      * ** *   **** * * **  *** != b[i])
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 * *   **   * *   * * *  *******      *    *   *   * *   ** *  **  *      * ** *  **** * *** *  * **** * * * **
*****  **  *  *** ** ***  *   *   ******* * * **  ******* *  ** * ** ** **   *    * ***  == b[strlen(a)-1])
 **  ***  *  **  ** *  ***   ***   * ** *** ** * * **  **   ***  * **  ** * *   ** * *  ** * * *******
   ******** * *    *  **  ** *    ** * **** **    *****    *   *    ***   *  ** *   ***  **     **  * ****  *        ** *** ****** * **  **  **     * *  ** *  is a prefix of %s",a,b);
***  *** * * *      ** *  ******  * *** *  ** *  ***  **** **      *   * **     * *** *     *** * *  *    **   ***   *****  ** *****
****  *  * **       ** ****   ****   *    *** **   *  * *  ***   *   * ** *  * *    ** **  ****     **
* **** *  *  *  *   **  ***  *   *  * *   **  ***
}
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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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