Controlling Decimal Places

1#include <iostream>
2using namespace std;
3
4int main() {
5  float Pi{3.14159265359};
6
7  // Default output
8  cout << "Default Pi: " << Pi << '\n';
9
10  // Set to 2 decimal places
11  cout.precision(2);
12  cout << "Pi with 2 digits: " << Pi << '\n';
13
14  // Set to 4 decimal places
15  cout.precision(4);
16  cout << "Pi with 4 digits: " << Pi;
17}

1#include <iostream>
2using namespace std;
3
4int main() {
5  float Price{19.99};
6  float WholeNumber{20.0};
7
8  // Set to show exactly 2 decimal places
9  cout.precision(2);
10  cout << fixed;
11
12  cout << "Price: $" << Price;
13  cout << "\nWhole number: $" << WholeNumber;
14
15  // You can turn off fixed mode if needed
16  cout.unsetf(ios::fixed);
17  cout << "\nBack to default: " << Price;
18}

1#include <iostream>
2using namespace std;
3
4int main() {
5  float Score{100.0};
6
7  // Default - no decimal for whole numbers
8  cout << "Score: " << Score << '\n';
9
10  // Force showing decimal point
11  cout << showpoint;
12  cout << "Score with decimal: " << Score;
13}