A C++ Program

[chichi]

1. Write a C++ program using while (cin>>x) to get several integer numbers and calculate the average.

[Denis]

Try this:

Code:

#include <iostream>
using namespace std;

int main()
{
int i = 0;
int sum = 0;
int x;
while (cin >> x)
{
sum += x;
i++;
}
if (i != 0)
cout << "Average: " << (double)sum / i << endl;
else
cout << "Average: 0" << endl;
system("PAUSE");
}

Read more here: C++ Notes: Idiom - cin loop

[chichi]

Denis

The output of the program is blank.

[Denis]

It's not. Just enter integers and, then, enter a char:

1
2
3
4
5
x

It'll calculate average.

[chichi]

Thanks Denis.
I have to write a C++ program using while (cin>>x) to get several float numbers, calculate the average and display the result on the screen. Use setprecision to display two digits after decimal point.

[Denis]

Try this code:

Code:

#include <iostream>
using namespace std;

int main()
{
int i = 0;
float sum = 0;
float x;
cout << "Enter numbers, type 'x' to stop: " << endl;
while (cin >> x)
{
sum += x;
i++;
}
cout.precision(2);
if (i != 0)
cout << "Average: " << fixed << (sum / i) << endl;
else
cout << "Average: 0" << endl;
system("PAUSE");
}

More about format flags here: format flags (streams, C++)

[Algolist.net Editor]

Topic has been split, see Program, C++.