fork download
copy 
  1. #include <stdio.h>
  2.  
  3. void g(double x)
  4. {
  5.   int c = 0, i;
  6.  
  7.   if (x < 0) {
  8.     putchar('-');
  9.     g(-x);
  10.     return;
  11.   }
  12.   while (x < 1) {
  13.     --c;
  14.     x *= 10;
  15.   }
  16.   while (x >= 10) {
  17.     ++c;
  18.     x /= 10;
  19.   }
  20.   putchar(x + '0');
  21.   putchar('.');
  22.   x -= (int)x;
  23.   x *= 10;
  24.   for (i = 0; i < 6; ++i) {
  25.     putchar(x + '0');
  26.     x -= (int)x;
  27.     x *= 10;
  28.   }
  29.   putchar('e');
  30.   if (c < 0) {
  31.     putchar('-');
  32.     c *= -1;
  33.   }
  34.   putchar(c + '0');
  35.   putchar('\n');
  36.   return;
  37.  
  38. }
  39.  
  40. int main()
  41. {
  42.   double f = 271.8281828;
  43.   g(f);
  44.   f /= 10000;
  45.   g(f);
  46.   f *= -1;
  47.   g(f);
  48.   return 0;
  49. }
  50.  
Success #stdin #stdout 0s 2292KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
2.718281e2
2.718281e-2
-2.718281e-2
https://ideone.com/pcIxc3
language:
C (gcc 8.3)
created:
10 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!