程序代码：

#include <stdio.h>
#define STOP '.'

int main(void)
{
    char ch;
    int count = 0;

    while ((ch = getchar()) != STOP)
    {
        if (ch != '"' && ch != '\'')
            count++;
    } // endof while
    
    printf("这里有%d个非引号字符。\n", count);

    return 0;
}