scientific_precision.cpp
812064abb968w6ex5_FR

scientific_precision.cpp
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			#include <iomanip>
			#include <iostream>
			#include <cmath>

			int main(){

			// for this output
			std::cout << std::scientific
			<< std::setprecision(15)
			<< M_PI << std::endl;

			//permanent
			std::cout.precision(15);
			std::cout.setf(std::ios::scientific);
			}