examples of C++ floating point types

long_double.cpp

#include <stdio.h>

int main() {
  float f = 99998.1F;
  double d = 99998.1;
  long double ld = 99998.1L;

  printf("sizeof(f)  = %lu\n", sizeof(f));
  printf("sizeof(d)  = %lu\n", sizeof(d));
  printf("sizeof(ld) = %lu\n", sizeof(ld));

  int precision = 25;
  printf("precision = %d\n", precision);
  printf("\tf  = %.*f\n", precision, f);
  printf("\td  = %.*f\n", precision, d);
  printf("\tld = %.*Lf\n", precision, ld);

  precision = 12;
  printf("precision = %d\n", precision);
  printf("\tf  = %.*f\n", precision, f);
  printf("\td  = %.*f\n", precision, d);
  printf("\tld = %.*Lf\n", precision, ld);

  return 0;
}