题目：输入10个字符，统计其中英文字母、空格或回车、数字字符和其他字符的个数。输入输出示例：括号内是说明输入Reold 123?输出Letter = 5, blank = 1, digit = 3, other=1 ＃include <stdio.h>void main ()［char c;int blank, digit, i, letter, other; Ţ blank=digit = letter =other=0; for (i=0; i <10; i++) c=getchar () ;／＊＊＊＊＊＊＊＊＊＊Program**********/ ／＊＊＊＊＊＊＊＊＊＊End **********/ ｛ printf ("letter = %d,blank = %d, digit = %d, other = %d\n", letter, blank, digit, other) ;

以下是程序的完整代码：

#include <stdio.h>

void main ()
{
    char c;
    int blank, digit, i, letter, other;

    blank = digit = letter = other = 0;

    for (i = 0; i < 10; i++)
    {
        c = getchar();

        if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
        {
            letter++;
        }
        else if (c == ' ' || c == '\n')
        {
            blank++;
        }
        else if (c >= '0' && c <= '9')
        {
            digit++;
        }
        else
        {
            other++;
        }
    }

    printf("letter = %d, blank = %d, digit = %d, other = %d\n", letter, blank, digit, other);
}

程序的思路是先初始化变量 `blank`、`digit`、`letter` 和 `other`，然后循环10次读入一个字符 `c`，根据 `c` 的类型判断它是英文字母、空格或回车、数字字符还是其他字符，然后分别对应地增加计数器变量的值。最后输出四个计数器变量的值。