How can I print to my file in binary instead of hexadecimal [duplicate]

Question

I am trying to write a file that outputs every possible 16 bit number. I am getting the output in 16 digit hex instead of 16 digit binary. How can I get it in binary. Thank you

FILE * file = fopen("16BitFile.txt", "w"); for(int i=0; i<65536; i++) { fprintf(file, "%016x\n", i); }

You might find std::bitset may save you some work of having to roll your own translation code. — WhozCraig
– WhozCraig, Commented Oct 18, 2013 at 20:23
And the bitset solution is detailed in the response to stackoverflow.com/questions/7349689/… — Trevor Tippins
– Trevor Tippins, Commented Oct 18, 2013 at 20:23

4pie0 · Accepted Answer · 2013-10-18 20:51:17Z

std::ifstream ifs ("16BitFile.txt", std::ifstream::in); int number; ifs>>number; std::bitset<16> x(number); std::cout<<x;

you can check this for more information about how to print integers using bitset

Waxrat · Accepted Answer · 2013-10-18 20:34:28Z

#include <stdio.h> #include <stdexcept> #include <stdint.h> int main() { FILE * file = fopen("16BitFile.txt", "wb"); int16_t i = 0; for (;;) { if (fwrite(&i, sizeof(i), 1, file) != 1) throw std::runtime_error("fwrite failed"); if (++i == 0) break; } if (fclose(file) != 0) throw std::runtime_error("fclose failed"); }

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