从一个字符串 中删除一个字符串...

#include <stdio.h>

#include <stdlib.h>

#include <string.h>



#define TRUE 1

#define FALSE 0



int del_substr ( char *str , char const *substr );



int

main ( void )

{

	char str[] = "i am not a hero!";

	char *substr = "not";

	

	if ( del_substr ( str , substr ) )

		printf ("%s" , str );



	else printf ("NOt founded!!!");

	

	return EXIT_SUCCESS;

}



int del_substr ( char *str , char const *substr )

{

	char *p1;           /* 流遍原始字符串 */

	char *p2;			/* 流遍被删字符串 */

	char *p3;			/* 中间变量，负责校对全部字符串相等*/

	

	p1 = str;

		

	for ( ; '\0' != *p1 ; p1++ ){

		for ( p2 =  const_cast<char *>(substr) , p3 = p1;  /* 用p3承接p1的值 */

		'\0' != *p2 ; p2++ , p3++ ){

			if ( *p2 != *p3 )

				break;	

		}

		

		/*

		** 给原始字符串重新赋值，以'\0' 结束

		*/

		while ( '\0' !=( *p1++ = *p3++ ))

			;

		

		return TRUE;

	}

	return FALSE;	

}