#include<stdio.h>
int main()
{
char c;
int letters = 0,space = 0,digit = 0,others = 0;
printf("输入字符\n");
while ((c = getchar()) != '\n')
{
if (c >= 'a'&&c <= 'z' || c >= 'A'&&c <= 'Z')
{
letters++;
}
else if (c >= '0'&&c <= '9')
{
digit++;
}
else if (c == ' ')
{
space++;
}
else
{
others++;
}
}
printf("字母=%d 数字=%d 空格=%d 其他=%d\n", letters, space, digit, others);
return 0;
}