I saw in the other comment that you need to do it in C++.
Example program:
#include <iostream>#include <iomanip> //important for setprecision() !!!using namespace std;int main(){ double variable = 1.33333333333333333; cout<<setprecision(1)<<variable; return 0;}
#include <iostream>#include <iomanip> //important for setprecision() !!!
using namespace std;
int main(){ double variable = 1.33333333333333333; cout<<setprecision(1)<<variable; return 0;}
It will print out "1.3"