统计输入的数字/字符的个数各为多少？

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1. #include <stdio.h>
   
2. #include <ctype.h>
   
3. 
   
4. int main(void) {
   
5.     size_t num[10] = {0};
   
6.     size_t blank = 0;
   
7.     size_t others = 0;
   
8.     int ch;
   
9.     while((ch = getchar()) != EOF) {
   
10.         if(isdigit(ch)) ++num[ch - '0'];
    
11.         else if(isblank(ch)) ++blank;
    
12.         else ++others;
    
13.     }
    
14.     for(size_t i = 0; i < 10; ++i)
    
15.         printf("num[%lu]: %lu\n", i, num[i]);
    
16.     printf("blank: %lu\n", blank);
    
17.     printf("others: %lu\n", others);
    
18.     return 0;
    
19. }
    

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万千只cnm

ctype.h