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  1. #include <stdlib.h>
  2. #include <stdio.h>
  3. #include <string.h>
  4.  
  5.  
  6. int main(int argc, const char * argv[])
  7. {
  8.     {
  9.         long max = 0;
  10.         for(long cur = 1;;)
  11.         {
  12.             max = cur;
  13.             cur = (cur<<1) + 1;
  14.             if (cur <= max) break;
  15.         }
  16.         printf("long max = %ld\n",max);
  17.     }
  18.     {
  19.         char max = 0;
  20.         for(char cur = 1;;)
  21.         {
  22.             max = cur;
  23.             cur = (cur<<1) + 1;
  24.             if (cur <= max) break;
  25.         }
  26.         printf("char max = %d\n",max);
  27.     }
  28.     {
  29.         unsigned char max = 0;
  30.         for(unsigned char cur = 1;;)
  31.         {
  32.             max = cur;
  33.             cur = (cur<<1) + 1;
  34.             if (cur <= max) break;
  35.         }
  36.         printf("char max = %d\n",max);
  37.     }
  38. }
  39.  
  40.  
Success #stdin #stdout 0s 10320KB
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stdin
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Standard input is empty
stdout
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long max = 9223372036854775807
char max = 127
char max = 255
https://ideone.com/PIjfhJ
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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