C 语言 习题 1-13

Posted 2020-10-11

练习 1-13 编写一个程序，打印输入中单词长度的直方图。

 1 #include <stdio.h>
 2 
 3 /* count digits, white space, others */
 4 
 5 int main(int argc, char const *argv[])
 6 {
 7     int c, i, j, nwhite, nother;
 8     int ndigit[10];
 9 
10     nwhite = nother = 0;
11     for (i = 0; i < 10; ++i) {
12         ndigit[i] = 0;
13     }
14 
15     while ((c = getchar()) != EOF) {
16         if (c >= ‘0‘ && c <= ‘9‘) {
17             ++ndigit[c-‘0‘];
18         } else if (c == ‘ ‘ || c == ‘\n‘ || c == ‘\t‘) {
19             ++nwhite;
20         } else {
21             ++nother;
22         }
23     }
24 
25     // printf("digits =");
26     for (i = 0; i < 10; ++i) {
27         printf("%d:", i);
28         for (j = 0; j < ndigit[i]; ++j) {
29             printf("*");
30         }
31         printf("\n");
32     }
33     printf("w:");
34     for (i = 0; i < nwhite; ++i) {
35         printf("*");
36     }
37     printf("\no:");
38     for (i = 0; i < nother; ++i) {
39         printf("*");
40     }
41     printf("\n");
42     // printf(", white space = %d, others = %d\n", nwhite, nother);
43 
44     return 0;
45 }