C++ How to make cout not use scientific notation
To force cout to print numbers exactly as they are and prevent it from using the scientific notation, we can use the std::fixed I/O manipulator as follows
#include <iostream>
using namespace std;
int main()
{
std::cout << "The number 0.0001 in fixed: " << std::fixed << 0.0001 << endl
<< "The number 0.0001 in default: " << std::defaultfloat << 0.0001 << endl;
std::cout << "The number 1000000000.0 in fixed: " << std::fixed << 1000000000.0 << endl
<< "The number 1000000000.0 in default: " << std::defaultfloat << 1000000000.0 << endl;
return 0;
}
Output
The number 0.0001 in fixed: 0.000100 The number 0.0001 in default: 0.0001 The number 1000000000.0 in fixed: 1000000000.000000 The number 1000000000.0 in default: 1e+09
