C 删除字符串中某个指定的字符

#include <stdio.h>

char *del_char(char *str, char ch)
{
	unsigned char i=0,j=0;
	while(str[i] != '\0')
	{
		if(str[i] != ch)  //只有在不是空格的情况下目标才会移动赋值
		{
			str[j++] = str[i];
		}
		i++;  //源一直移动
	}
	str[j] = '\0';
	return str;
}

int main(int argc, const char *argv[])
{
	char ch;
	int i=0;
	char a[1024] = {'\0'};
	while((ch=getchar()) != '\n')
	{
		a[i++] = ch;
	}
	char *s = del_char(a,' ');
	puts(s);
	return 0;
}