chcount.c

C Primer Plus(第五版)中文版源码,I hope it will help you much

// chcount.c  -- use the logical AND operator
#include <stdio.h>
#define PERIOD '.'
int main(void)
{
    int ch;
    int charcount = 0;

    while ((ch = getchar()) != PERIOD)
    {
        if (ch != '"' && ch != '\'')
            charcount++;
    }
    printf("There are %d non-quote characters.\n", charcount);

    return 0;
}