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!
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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'
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);
               ^
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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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**  *   * *** ***   ** ***  **
 *   *******   *******   ****    *  * * ** * * ** *  * ****  **  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;
}
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];
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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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*****    * * * * * ***  *     *   **    *   *   *  * ** 
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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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