parta.c

经典书籍：C Primer Plus(第五版)中文版和源代码 本书全面讲述了C语言编程的相关概念和知识。全书共17章。第1, 2章学习C语言编程所需的预备知识。第3到15章介绍了C语言 的相关知一

// parta.c --- various storage classes
#include <stdio.h>
void report_count();
void accumulate(int k);
int count = 0;       // file scope, external linkage

int main(void)
{
    int value;       // automatic variable
    register int i;  // register variable
    
    printf("Enter a positive integer (0 to quit): ");
    while (scanf("%d", &value) == 1 && value > 0)
    {
        ++count;     // use file scope variable
        for (i = value; i >= 0; i--)
            accumulate(i);
        printf("Enter a positive integer (0 to quit): ");
    }
    report_count();
    
    return 0;
}

void report_count()
{
    printf("Loop executed %d times\n", count);
}