Mega Code Archive
Read double value from keyboard and save it to another value
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#include <iomanip>
#include <ios>
#include <iostream>
#include <string>
using std::cin; using std::setprecision;
using std::cout; using std::string;
using std::endl; using std::streamsize;
int main()
{
cout << "Please enter your first name: ";
string name;
cin >> name;
cout << "Hello, " << name << "!" << endl;
cout << "Please enter your midterm and final exam grades: ";
double midterm, final;
cin >> midterm >> final;
cout << "Enter all your homework grades, " "followed by end-of-file: ";
int count = 0;
double sum = 0;
double x;
while (cin >> x) {
++count;
sum += x;
}
streamsize prec = cout.precision();
cout << "Your final grade is " << setprecision(3)
<< 0.2 * midterm + 0.4 * final + 0.4 * sum / count
<< setprecision(prec) << endl;
return 0;
}
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