In this HackerRank Print Pretty problem in c++, we have given a text file with many lines of numbers to format and print, for each row of 3 space-separated doubles, format and print the numbers using the specifications in the Output Format section below.

## HackerRank Print Pretty in C++ problem solution

```#include <iostream>
#include <iomanip>
using namespace std;

int main(){
int T; cin >> T;
cout << setiosflags(ios::uppercase);
cout << setw(0xf) << internal;
while(T--) {
double A; cin >> A;
double B; cin >> B;
double C; cin >> C;

/* BEGIN: unlocked */
// Sample solution:
cout << left << hex << showbase << nouppercase;
cout << (long long) A << endl;

// One decimal place, right aligned, show sign, and fill left with underscores
cout.precision(2);
cout << showpos << fixed << setfill('_') << setw(15) << right;
cout << B << endl;

// Scientific notation with 9 decimal places
cout.precision(9);
cout << noshowpos << uppercase << scientific;
cout << C << endl;
/* END: unlocked */
}
return 0;

}
```