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  1. #include <stdlib.h>
  2. #include <stdio.h>
  3. #include <string.h>
  4.  
  5. char *mygcvt(double val)
  6. {
  7.     char buf1[256];
  8.     static char buf2[256];
  9.     int prec = 1;
  10.     size_t len, maxlen = 0;
  11.     for (;;)
  12.     {
  13.         len = strlen(gcvt(val, prec, buf1));
  14.         if (len <= maxlen)
  15.             break;
  16.         maxlen = len;
  17.         strcpy(buf2, buf1);
  18.         prec++;
  19.     }
  20.     return buf2;
  21. }
  22.  
  23. int main(void)
  24. {
  25.     printf("%s\n", mygcvt(0.0));
  26.     printf("%s\n", mygcvt(1.0));
  27.     printf("%s\n", mygcvt(0.1));
  28.     printf("%s\n", mygcvt(0.123));
  29.     printf("%s\n", mygcvt(0.3333333333333333333333333333333333333333333));
  30.     return 0;
  31. }
  32.  
Success #stdin #stdout 0s 2248KB
comments (?)
stdin 
Standard input is empty
stdout 
0
1
0.1
0.123
0.33333333333333331
https://ideone.com/AVDono
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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