main.cpp

来自「易学c++程序实例 本章主要讲述一些学习程序设计前需要了解的一些知识和一些学习」· C++ 代码 · 共 35 行

#include "iostream.h"
int abs(int a);
float abs(float a);
double abs(double a);
char abs(char a);
void main()
{
	int a=-5,b=3;
	float c=-2.4f,d=8.4f;
	double e=-3e-9,f=3e6;
	cout <<"a=" <<abs(a) <<endl <<"b=" <<abs(b) <<endl;
	cout <<"c=" <<abs(c) <<endl <<"d=" <<abs(d) <<endl;
	cout <<"e=" <<abs(e) <<endl <<"f=" <<abs(f) <<endl;
}
int abs(int a)
{
	cout <<"int abs" <<endl;
	return (a>=0?a:-a);
}
float abs(float a)
{
	cout <<"float abs" <<endl;
	return (a>=0?a:-a);
}
double abs(double a)
{
	cout <<"double abs" <<endl;
	return (a>=0?a:-a);
}
char abs(char a)
{
	cout <<"char abs" <<endl;
	return (a>=0?a:-a);
}