C++程序设计实验报告(七十九)---第十六周任务一

#include<fstream>

#include<iostream>

#include<iomanip>

using namespace std;

void salary(double a[],int num);

void bubble_sort(double a[], int num);

void output_array(double a[], int num);

int main()
{
	double sal[500] ;

	ifstream infile( "salary.txt", ios::in );

	if(!infile)
	{
		cerr << "open error" << endl;

		exit(1);
	}

	for(int i = 0; i < 500; ++i)
	{
		infile >> sal[i];
	}

	infile.close();

	salary(sal, 500);
	bubble_sort(sal, 500);   //用冒泡法按降序排序a中元素
	output_array(sal, 500);   //输出排序后的数组
	ofstream outfile("ordered_salsry.txt", ios::out);

	if(!outfile)
	{
		cerr << "open error!" << endl;

		exit ( 1 );
	}

	for(int i = 0; i < 500; i++ )
	{
		outfile << sal[i] << '\t' ;

		if( (i+1) % 15 == 0 )
		{
			cout << endl ;
		}

	}

	outfile.close() ;
	system("pause");
	return 0 ;
}
void salary( double a[], int num )
{
	for(int i = 0; i < num; i++ )
	{
		a[i] = a[i] + 100.00;
	}
}

void bubble_sort(double a[], int num )
{
	double t;

	for(int j = 0; j < num-1; j++)
	{
		for(int i = 0; i < num-1-j; i++)
		{
			if(a[i] < a[i+1])
			{
				t = a[i];
				a[i] = a[i+1];
				a[i+1] = t;
			}
		}
	}
}

void output_array(double a[], int num)
{
	for(int i = 0; i < num; i++ )
	{
		cout << a[i] << "  " ;

		if( (i+1) % 15 == 0 )
		{
			cout << endl ;
		}
	}
}


           

运行结果：