用函数将一串字符分类

#include<stdio.h>
int fun(char a[20]);
int fun1(char a[20]);
int fun2(char a[20]);
int fun3(char a[20]);
int main()
{
	char arry[20];
	int x=0, y=0, z=0, p=0,q=0;
	gets(arry);
	x = fun(arry);
	y = fun1(arry);
	z = fun2(arry);
	p = fun3(arry);
	q = p - x - y - z;
	printf("字母%d\n数字%d\n空格%d\n其它%d\n", x, y, z, q);
	getchar();
	getchar();
	return 0;
}
int fun(char a[20])
{
	int b=0,i;
	for (i = 0; i < 20; i++)
	{
		if (a[i] >= 'a'&&a[i] <= 'z')
			b = b + 1;
		else
			fun1(a);
	}
	return b;
}
int fun1(char a[20])
{
	int c=0, i;
	for (i = 0; i < 20; i++)
	{
		if (a[i] >= '1' && a[i] <= '9')
			c = c + 1;
		else
			fun2(a);
	}
	return(c);
}
int fun2(char a[20])
{
	int d=0, i;
	{
		for (i = 0; i < 20; i++)
			if (a[i] == ' ')
				d = d + 1;
			else
				fun3(a);
				
	}
	return (d);
}
int fun3(char a[20])
{
	int l;
	l = strlen(a);
	return (l);
}

运行结果如下: