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  1. #include <iostream>
  2. #include <iomanip>
  3.  
  4. int main() {
  5. 	double const number = 123.456789;
  6. 	for (int i = 0; i != 15; ++i) { std::cout << i << ": " << std::setprecision(i) << number << "\n"; }
  7. 	return 0;
  8. }
Success #stdin #stdout 0s 3296KB
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stdin
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Standard input is empty
stdout
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0: 1e+02
1: 1e+02
2: 1.2e+02
3: 123
4: 123.5
5: 123.46
6: 123.457
7: 123.4568
8: 123.45679
9: 123.456789
10: 123.456789
11: 123.456789
12: 123.456789
13: 123.456789
14: 123.456789
https://ideone.com/eA08DI
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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