课后作业,求最小值等题目答案

#include <stdio.h>

int main(void)

{

int letter=0,blank=0,digit=0,other=0;

char c;

while((c=getchar())!='\n'){

if(c==' ')

blank++;

else if(c>='1'&&c<='9')

digit++;

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

letter++;

else other++;

}

printf("letters=%d\n",letter);

printf("blank=%d\n",space);

printf("digit=%d\n",digit);

printf("other=%d\n",other);

return 0;

}