C + + cout reserved decimal place

Header file Required <iomanip>

Fixed and setprecision () required for output

The fixed represents the output floating point number, and the setprecision () sets the precision.

#include <iostream> #include <iomanip> #include <cstdio>using namespace std;int main (int argc, Char Const *argv[]) {    printf ("%.2lf\n", 12.345);    cout <</* fixed << */setprecision (2) << 12.345 << Endl;    cout << fixed << setprecision (2) << 12.345 << Endl;    return 0;}

The output is:

12.351212.35

　　

C + + cout reserved decimal place