C 判断数据类型？

参考

#include <stdio.h>
int main(){
    char c;
    printf("Input a character:");
    c=getchar();
    if(c<32)
        printf("This is a control character\n");
    else if(c>='0'&&c<='9')
        printf("This is a digit\n");
    else if(c>='A'&&c<='Z')
        printf("This is a capital letter\n");
    else if(c>='a'&&c<='z')
        printf("This is a small letter\n");
    else
        printf("This is an other character\n");
    return 0;
}