How to achieve to following C++ output formatting?
- by Yan Cheng CHEOK
I wish to print out double as the following rules :
1) No scietific notation
2) Maximum decimal point is 3
3) No trailing 0.
For example :
0.01 formated to "0.01"
2.123411 formatted to "2.123"
2.11 formatted to "2.11"
2.1 formatted to "2.1"
0 formatted to "0"
By using .precision(3) and std::fixed, I can only achieve rule 1) and rule 2), but not rule 3)
0.01 formated to "0.010"
2.123411 formatted to "2.123"
2.11 formatted to "2.110"
2.1 formatted to "2.100"
0 formatted to "0"
Code example is as bellow :
#include <iostream>
int main() {
std::cout.precision(3);
std::cout << std::fixed << 0.01 << std::endl;
std::cout << std::fixed << 2.123411 << std::endl;
std::cout << std::fixed << 2.11 << std::endl;
std::cout << std::fixed << 2.1 << std::endl;
std::cout << std::fixed << 0 << std::endl;
getchar();
}
any idea?
