1-11 Exercise 3: Prefix of a string

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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

 

[Exercise] Coding (C) - asked in Chapter 13: Strings by (12.1k points)
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#include<stdio.h>
#include<string.h>
char prefix(char string1[],char string2[])
{
    int i,s;
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 * *   *  ** *   * ** ********   * ** *  *****  ** 
    {
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    }
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    {
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 * *******  ** * * * *  * * *   *   *   ***   *  
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  *        *** **       *  **    **  *  ***  * *** 
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*  * * **    ** **  *    * * * ** **    ** *     
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  ******  **  ** * * * ****  *  **      *   ****   * ** **** * * *  ** * * *** *  ** *   **  *  is not a prefix of %s", string1, string2);
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    }
}
int main (void)
{
    char chaine1[1001], chaine2[1001];
***   *  ** *** ** * * ***   ***** *    %s", chaine1,chaine2);
*  *  **  ***    * ***  ***     *   *** **
    *** *** *   ** *   * ***   0;
}
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#include <stdio.h>

#include <string.h>

int main()
{
***  *      *** **** *  *    ** lenght1,lenght2,c;
** *     **    * *  ** * **  *  b[100];
* * * * ***    * * * ** *   * a[100];
   *** * **   ** *  *         *  * d[100];
* * *** **  * **    *** *   **  * *  *   **    * * **
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 *   **    * ** * **   * **    **** **    *** **** **   is a prefix of %s",a,b);
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 * *  **  * *  ***  * ** ***** 
 * *   ****** *  **  ** ** *  * *
 **** * ********  *  *  ***  **  ****  ** **** * ** * * **  ** **** * ** is not a prefix of %s",a,b);
 *** * ***  *******    *
*****     * *    **    **** *     0;
}
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Hidden content!
#include <stdio.h>
#include  ** **   * *   
#include ** * *  * ***  *
//#include <ctype.h>
#define n 100
int aa(char A[],char B[])
{
  * *** **     *** i;
* * *       * *** ***   **  *** ** 
  {
 * **  ** * ** *   ** * *** ****     ** **  A[i]!='\0' && A[i]!=B[i]   )
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***   ** **** * ** *** *   *   ** ** *** ** ** *  * * **   ** **** *  *** *
  }
  **  **    *     1;
}


int main()
{
* *   *   * * * * **     ** a[n],b[n],c[n];
* *  *     *   *******   *   i;
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* ***   * **  * * **  **** *   * *  * *******  *  
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 *  *  * * *** * ** **   ****  **  *** * * * 
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* * * *  **** *   ** **   *** 
  *  ** ** *   * ********   *    *      ****  **** ** ** *** * * **** is not a prefix of %s",a,b);
* * **    ********* **    0;
}
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Hidden content!
#include  ** *****  ** 
*  **  * **** *** *  ****  
int main (){
char **    
char    *  
 *** *  *  **  **  string1: * **** 
****   ** *  **       * *****     *
  *** * *  ***    string2:  ** *  ** 
 ** *****   *  * *  * ** 
*  *** **    *    * 
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else
   ****   ** ******* ** ** *** **     * is not prefix of    ***  **    * * 

return 0;
}
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prog.c: In function 'main':
prog.c:7:9: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
 scanf("%s",&string1);
         ^
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Hidden content!
#include *  *  * * * **
#include   ***   *   ***
#include   * *  ** *   * *  
#include ***    *****  * 
int prefix(char p[],char s[])
{
** * * * ******* * * **  ***  * *  *   *
  * * * *   *   *  *  * *   *   0;
 **** *** *  * ** *   * * if  *  * *   ***   **
*******    ***    *  *** * 1;
 * **  *** * *   * * *
 **** *  *  * *  *  *  *      * 0;
}

int main()
{
  ***  * * *****  * ***   p[999],s[999];
    * ** **     *    **  *  *** ****    
**  *   *  * ***   ****** * **    ** * ** * *

   *** * ******   *  *   * * *   
*  *  ***  **  *  * **  *   *  * ** **  * is a prefix of %s",p,s);
   * *  * ***  ** *  ** **
*  *  **** ***** *  * **    *** ***  ** * is not a prefix of    *  **   

 ***   **           ** * 0;
}
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#include <stdio.h>
#include ** *  **  *   * * 
int main()
{
   * ***  ****  * ****  *    **** * length1,length2,c;
**** * * *  * * *  *** * **  a[100];
* *  *    *  *        ***  * b[100];
****   * ***     *    * **  d[100];
 *       ** *   *   **   *  *    **   ** **
**    * * ****   **   *   ****** **     ** * ****
* *   ** *  * ***  ** ********  * 
   *  *   * *  *  ****    *  *    * * **
if (strcmp(a,d)==0)
*  *    * *** *  *   * ** *
  ** * *     **  **** * ** *  ** * *      **  ** *   * **      *  is a prefix of %s",a,b);
*  * ***  * *  *    *  ** * * *
   *** ** *  **** *  ***
** ** ** ** ** **  ** ***
 **  *    ** *  ** * * **    *  ** *****    ***  ** * **  * *  ******* is not a prefix of %s",a,b);
* **    ** ***   * ** *  ** ***
 * ***  ***  ** * 0;
}
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Hidden content!
#include ***   ** *** 
#include * **   * ** * 

int prefix (char **    * str2[])
{
*** * * * ***  * *    * ** * length=0,  ** *  
* *  * ** *** ** * 
 * * * ***   ** ***** *  *  =  *  **** * ****
  *            ***  * **
**** ** ***** * ***   * **  *    *  ***** ** * 
**  * *   *  ***   **   *****  **   ** ** *
 **     * ** ** ** * *  * **  if  ** * **   
    *   *   *   **** **        * *      *   **     *   
*  ** ***  ** ***** *   *** * *   **   }
  *  * *           *  * * ** * ***  **
*  *** * **   *   ***  (count == length)
 *  ** *  ** * ** ** * ** ** ** **   **   ***** 1;
* **   ** *  *****    *** ** else *  **   * 0; *** * ** **   *   *    
 * *    *  *** *** * **** * ***   
}
int main(void)
{
** * * *   *        ** *      ****  ** 
*** ***   ******   * * 
  *** ** *      *  * *       * **   **   * *   * str1, str2);

***  * *    **  *** *  * *  * ***   ** *** 
 * *  * *  **  {
*  **  ** *** **    ** ***  *   *****  ***** ***    * *** ***   is a prefix of ****  str1, str2);
  * * ***       **  *****
** *    * ****   ** *** *  ****
******  ** * ** * **   ***** ***********  *       ** **  *  * *** *   is not a prefix of  ***  * str1, str2);

   * *** *   ***  *  *  0;
}
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#include    *  * ***  ** 
#include ****  **   *   ** *
#include *   * ** **  ** * 

int main()
{
 *  * ****       ****   *  * prefix[100];
*** *  *** * *   *** **  *   *  * word[100];
* * ** *   * **  *     * * **   ****   * %s", prefix, word);
 *** * * *  * *** ***    * **   i;
* * * * *  *  *    * **     = 0; i< strlen(prefix); ++i)
     *****  *      **    * ** 
*** * *  *  ** * **  *   ** **  *   ****  *    * * *  * * ****  *
*     ****   ****  *****  * *          ******* ** *  *** * 
 ** * *  * * ***** **  *  *** ** *  *  * * *** * ***** *** **   *** **  * *  *** * *      is not a prefix of %s", prefix, word);
   * *** ** ** **** ** **    **  * ** * ***** ****    ***** **  * ** * *    0;
 *** * * * **** * ** ***   *    ********   * *   ** * *
      ** * ** *   *** * *   
***   * *  ***    * ** *** *** **  ** is a prefix of %s", prefix, word);
* * *  * *  *   *** **    ** 0;
}
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Hidden content!
#include * ***   *** *
#include  ** *     **   * * 
#include   ****** ***  ** 

int main()
{
 *  ****    *  * *  *** ***  * prefix[100];
    ***** ***  ** *   * * **  word[100];
*   * ****  * * ** * * *   *   *   * %s", prefix, word);
*****    *   * * * * ** *  ** * i;
****** * * ** ******* **   **  = 0; i< strlen(prefix); ++i)
 *   **** ** ** **   **  ***** 
 **   *  *    * ** ***   * *** *     ** * ** *** ** * * *** * ** ** *  **
* ** *  ** ***   *  *  ** ***   ** *   ** **    *  *  * * **    *
** * * ** **     ** *   *  * * **  *  *   *  *   * ** *     *  *  **  ***** *   ** *  * **** is not a prefix of %s", prefix, word);
   **   ** *  *** ** ** ** * * ** *  ** * ** * *  ** *  * ***  *   *  *    ** 0;
    *   ** ***  ***   *****  *  *        *  * *** **  *   
** *** ** *   ** *** *  *
** ** * * ******  ***   * ** *  *** * *   is a prefix of %s", prefix, word);
  * * * *   **   ****  ** **  * 0;
}
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*    *  ****  *   * *  *
  * * *  ** ** **   * 
 *   ****  ** ** ** 

int main()
{
  ****  * *** * *  char      * *  
  * *** * ******* char * *    
  ** *     **     ** *  * * *** **       word);
** ** *  **   int i;
 *** *   * *  for(i = 0;   * * *  *  ****** ++i)
* *  * *    **    {
  **  * *     * *  *      *****   ***** **** ***
*******  *      * * ***  *  * **  {
      ** * ** * ** * *  *     *   *  * *    *** *  ** *   *    is not a    *  of   ***** * *   * word);
* **    *    * **  *   * * *** ****    **     * 0;
 * * ***    ***  *    * **  * }
   *       **** }
    **   **  **  *    *    *** is a prefix of  **   *  **   *** word);
** **  *** * ***    *  ** 0;
}
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