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  1. #include <cstdio>
  2.  
  3. template <typename number> char * tobinary(number x, char *buf)
  4. {
  5.     number q;
  6.     char *p=buf;
  7.  
  8.     if((number)~0<0)
  9.     {
  10.         *(p++) = '0' + (x<0);
  11.         q = (number)1 << ((sizeof(number)<<3) - 2);
  12.     }
  13.     else
  14.         q = (number)1 << ((sizeof(number)<<3) - 1);
  15.  
  16.     for(; q; q>>=1)
  17.         *(p++) = x & q ? '1' : '0';
  18.  
  19.     *p = 0;
  20.  
  21.     return buf;
  22. }
  23.  
  24. #define POSVAL 7
  25. #define NEGVAL -7
  26.  
  27. int main(void)
  28. {
  29.     char temp[128];
  30.  
  31.     #define TEST(type,val) do { type x=val; puts(tobinary(x, temp)); } while(0)
  32.  
  33.     TEST(char, POSVAL);
  34.     TEST(unsigned char, POSVAL);
  35.     TEST(signed char, POSVAL);
  36.  
  37.     TEST(unsigned short, POSVAL);
  38.     TEST(signed short, POSVAL);
  39.  
  40.     TEST(unsigned, POSVAL);
  41.     TEST(signed, POSVAL);
  42.  
  43.     TEST(unsigned long, POSVAL);
  44.     TEST(signed long, POSVAL);
  45.  
  46.     TEST(unsigned long long, POSVAL);
  47.     TEST(signed long long, POSVAL);
  48.  
  49.     TEST(char, NEGVAL);
  50.     TEST(unsigned char, NEGVAL);
  51.     TEST(signed char, NEGVAL);
  52.  
  53.     TEST(unsigned short, NEGVAL);
  54.     TEST(signed short, NEGVAL);
  55.  
  56.     TEST(unsigned, NEGVAL);
  57.     TEST(signed, NEGVAL);
  58.  
  59.     TEST(unsigned long, NEGVAL);
  60.     TEST(signed long, NEGVAL);
  61.  
  62.     TEST(unsigned long long, NEGVAL);
  63.     TEST(signed long long, NEGVAL);
  64.  
  65.     #undef TEST
  66.  
  67.     getchar();
  68.  
  69.     return 0;
  70. }
Success #stdin #stdout 0s 3472KB
comments (?)
stdin
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Standard input is empty
stdout
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00000111
00000111
00000111
0000000000000111
0000000000000111
00000000000000000000000000000111
00000000000000000000000000000111
00000000000000000000000000000111
00000000000000000000000000000111
0000000000000000000000000000000000000000000000000000000000000111
0000000000000000000000000000000000000000000000000000000000000111
11111001
11111001
11111001
1111111111111001
1111111111111001
11111111111111111111111111111001
11111111111111111111111111111001
11111111111111111111111111111001
11111111111111111111111111111001
1111111111111111111111111111111111111111111111111111111111111001
1111111111111111111111111111111111111111111111111111111111111001
https://ideone.com/IHMlWD
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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