字符串分类统计

解题思路：运用while循环输入字符，换行终止输入，if else语句进行计数，较为简便

注意事项:while循环输入时用&&语句终止循环注意终止符号。

参考代码:

#include<stdio.h>

int main()

{

char m;

int lettle = 0;

int num = 0;

int block = 0;

int other = 0;

while(scanf("%c", &m)&&m!='\n')

{

if ((m <= 'z' && m >= 'a')|| (m >='A' && m <= 'Z'))

lettle++;

else if (m >= '0' && m <= '9')

num++;

else if (m == ' ')

block++;

else

other++;

}

printf("%d %d %d %d", lettle, num, block, other);

return 0;

}