统计输入的数字/字符的个数各为多少？

人造人

#include <stdio.h>
#include <ctype.h>

int main(void) {
    size_t num[10] = {0};
    size_t blank = 0;
    size_t others = 0;
    int ch;
    while((ch = getchar()) != EOF) {
        if(isdigit(ch)) ++num[ch - '0'];
        else if(isblank(ch)) ++blank;
        else ++others;
    }
    for(size_t i = 0; i < 10; ++i)
        printf("num[%lu]: %lu\n", i, num[i]);
    printf("blank: %lu\n", blank);
    printf("others: %lu\n", others);
    return 0;
}

万千只cnm

ctype.h