从字符串中删除指定子串或指定元素

一）从字符串中删除指定子串

转载地址：

http://hi.baidu.com/fangm/item/85b8db57b926ed948d12ed44

#include 

void delsub(char *str, char *sub)
{
	char *psrc = str, *pdest = str, *psub, *p;

	if((str == NULL) || (sub == NULL))
		return;

	while(*psrc)
	{
		p       = psrc;
		psub   = sub;
		while(*p && *p == *psub)
		{
			p++;
			psub++;
		}

		if(*psub == 0)//找到一个子串
			psrc = p;
		else
			*pdest++ = *psrc++;
	}
	*pdest = 0;
}

int main()
{
	char str[] = "askdaskaskaaaaadaskg";
	char sub[] = "ask";
	cout<<"first str = "<#include
using namespace std;
#include 

int main(void)
{
	char uu[20], *p, *sub = "ask", *str = "askdaskaskaaaaadaskg", *str2;
	int n = 0, i = 0;
	p = sub;
	str2 = str;
	while (*str2)
	{
		while (*p)
		{
			if (*p == *str2)
				break;
			p++;
		}
		if (*p == '\0')
		{
			uu[i] = *str2;
			i++;
		}
		str2++;
		p = sub;
	}
	uu[i] = 0;
	str = uu;
	printf("\n %s", str);
	return 0;
}