func_main.cpp

来自「一些VC++的经典实例」· C++ 代码 · 共 42 行

//Program ex8  函数的使用,文件的引用,变量的作用域
#include "func.h"
#include "stdio.h"

float gvar=1.0;

void plus3(float num1)
{
	gvar+=num1;
	printf("在plus3()里gvar=%f\n",gvar);
}

int main(void)
{
	float n1=3.1;
	float n2=2.4;

	float sum;

	printf("当前全局变量gvar的值为%f\n",gvar);
	gvar+=2.0;

	printf("经过gvar+=2.0后,gvar的值为%f\n\n",gvar);

	printf("调用plus1()前,n1=%f,n2=%f\n",n1,n2);

	sum=plus1(n1,n2);

	printf("退出plus1()后,n1=%f,n2=%f,sum=%f\n\n",n1,n2,sum);

	plus2(&n1,n2);

	printf("退出plus2()后,n1=%f,n2=%f,sum=%f\n\n",n1,n2);

	plus3(n1);

	printf("退出plus3()后,gvar=%f\n",gvar);

	return 1;
}