除掉字符串里面相同的字符#include <stdio.#include <stdlib.#include <strin

题目:

除掉字符串里面相同的字符

such as 字符串“aaaabbbccdd” 出去相同的字符就会变成“abcd”

代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void grepString1(char a[]) {
	int length = strlen(a);
	int i = 0, j = 0;
	for (i=0; i < length; ++i) {
		if (a[i] != 0) {
			a[j++] = a[i];
			for (int k = i+1; k < length; k++) {
				if (a[i] == a[k]) {
					a[k] = 0;
				}
			}
		}
	}
}

void grepString2(char a[]) {
	bool h[256];
	memset(h, 0, sizeof(h));
	int i = 0, j = 0; 
	while (a[i]) {
		if (!h[a[i] - 'a']) {
			a[j++] = a[i];
			h[a[i] - 'a'] = true;
		}
		++i;
	}
	a[j] = 0;
} 

int main() {
	char a[10] = "aaabbccdd";
	grepString1(a);
	printf("字符串里面不同的字符为%s\n", a);
	char str[100] = "aaabbccdddddfffffdaaceeedj";
	grepString2(str