11.20课程练习

#include <stdio.h>  

int main() {  
	char ch;  
	int E = 0, K = 0, N = 0, O = 0;  
	ch = getchar();  
	while (ch != '\n') {  
		if (ch == ' ') {  
			K++;  
		} else if (ch >= '0' && ch <= '9') {  
			N++;  
		} else if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')) {  
			E++;  
		} else {  
			O++;  
		}  
		ch = getchar();  
	}  
	printf("E=%d, K=%d, N=%d, O=%d", E, K, N, O);  
	return 0;  
}