#include<iostream>
#include<fstream>
int main()
{
using namespace std;
char automobile[50];
int year;
double a_price;
double d_price;
ofstream outFile;
outFile.open("c.txt");
cout << "Enter the make and model of automobile:";
cin.getline(automobile,50);
cout << "Enter the model year";
cin >> year;
cout << "Enter the original asking price: ";
cin >> a_price;
d_price = 0.913*a_price;
cout << fixed;
cout.precision(2);
cout.setf(ios_base::showpoint);
cout << "Make and model: " << automobile << endl;
cout << "year: " << year << endl;
cout << "Was asking $" << a_price << endl;
cout << "Now asking $" << d_price << endl;
outFile << fixed;
outFile.precision(2);
outFile.setf(ios_base::showpoint);
outFile << "Make and model: " << automobile << endl;
outFile << "Year: " << year << endl;
outFile << "Was asking $" << a_price << endl;
outFile << "Now asking $" << d_price << endl;
outFile.close();
return 0;
}
#include<iostream>
#include<fstream>
#include<cstdlib>
const int SIZE = 60;
int main()
{
using namespace std;
char filename[SIZE];
ifstream inFile;
cout << "Enter name of data file: ";
cin.getline(filename,SIZE);
inFile.open(filename);
if (!inFile.is_open())
{
cout << "Could not open the file " << filename << endl;
cout << "Program terminating.\n";
exit(EXIT_FAILURE);
}
double value;
double sum = 0.0;
int count = 0;
inFile >> value;
while (inFile.good())
{
++count;
sum += value;
inFile >> value;
}
if (inFile.eof())
cout << "Enf of file reached.\n";
else if (inFile.fail())
cout << "Input terminated by data mismatch.\n";
else
cout << "Input terminated for unknown reason.\n";
if (count == 0)
cout << "No data processed.\n";
else
{
cout << "Items reak: " << count << endl;
cout << "Sum: " << sum << endl;
cout << "Average: " << sum / count << endl;
}
return 0;
}
C++ 简单文件输入输出代码记录
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转载自blog.csdn.net/qq_42543697/article/details/83828649
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