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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    }
}
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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 **** * *** * * *   * ***** * 
   ** * * ******  *  *   **** * ** 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;
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  }
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}


int main()
{
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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[])
{
  *        **** ***    *** *** ** ** *  
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 * **** ********* * *      if **      * 
 ****   * *   * ** * *  * **** 1;
* * ** *   * *   * **   *
*  *   * * * ****  * *    * *  * 0;
}

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

***    ***  *        *   ** 
 ** *   ** **    *******    *       * * 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)
** ** ** *     *   **  * 
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 *    **     * * ** * * * ***
*   **  * *** *  ** *  
  *    **** **   * * *  *  *  ***     ***** ** ** ** * *** *   *  * is not a prefix of %s",a,b);
* *  * **    * *  *  *  *  *  
  ****    * ** *  * 0;
}
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Hidden content!
#include **** ** * *****  * 
#include * *  ****  *** *

int prefix (char *****   str2[])
{
**    ** * * *    ****  length=0, *    * 
  *  ** ***  *   ** 
  *  * * *    * ** *      * ***  = *    * **** * ** **
***** ****** ***   *  *  * 
 **      * * *  ******* *  ***** **     **
 *** **   **     *  * *  **  ******     ***
 * * *  ****** *****   **  ** if **** * * * 
***  *    *   ***  *         * ****  * *  *     *   **   
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 *   * *          *  ** * ** **   * ** *
*  ** ** * ** * * * **** (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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