#include<stdio.h> int letter, digit, space, others; void CountChar(char str[]) { int i; for (i = 0; str[i] != '\0'; i++) { //统计字母 if ((str[i] >= 'a'&& str[i] <= 'z') || (str[i] >= 'A' && str[i] <= 'Z')) letter++; else if (str[i] >= '0' && str[i] <= '9') //统计数字 digit++; else if (str[i] == ' ')//统计空格 space++; else others++; //统计其他字符 } } int main() { char text[80]; gets(text); CountChar(text); printf("%d %d %d %d", letter, digit, space, others); return 0; }