Printf() - float variables...

  double a, b, c;
  a = 1.0;
  b = 2348.34;
  c = 23.0000003;

  printf("a --> %5g", a);
  printf("b --> %5g", b);
  printf("c --> %5g", c);

#include <stdio.h>

int main(void)
{
   double a, b, c;
   a = 1.0;
   b = 2348.34;
   c = 23.0000003;

   printf("a --> [%5.0f]\n", a);
   printf("b --> [%5.0f]\n", b);
   printf("c --> [%5.0f]\n", c);
   return 0;
}

/* my output
a --> [    1]
b --> [ 2348]
c --> [   23]
*/