Formatting output in C++

Question

In a C++ code I have a matrix of double variables which I print out. However because all of them have different number of digits, the output format is destroyed. One solutio

Answer 1

Take a look at stream manipulators, especially std::setw and std::setfill.

float f = 3.1415926535;
std::cout << std::setprecision(5)   // precision of floating point output
          << std::setfill(' ')      // character used to fill the column
          << std::setw(20)          // width of column
          << f << '\n';             // your number