How to regulate the volume of digits to appear once the decimal-position character to get a double variable? two Jerry CoffinJerry Coffin 493k8383 gold badges652652 silver badges1.1k1.1k bronze badges seven 12 Observe that g++ rejects %lf when compiling with -Wall -Werror -pedantic: error: ISO C++ does not aid the ‘%lf’ https://johnh046yiu2.wikipublicity.com/user