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  1. #include <iostream>
  2. #include <stdio.h>
  3. #include <cstdlib>
  4. #include <cstring>
  5. using namespace std;
  6.  
  7. #define b 2
  8.  
  9. int main(void)
  10. {
  11. int a0=0;
  12. int a1=1;
  13.  
  14. #if(a0==0)
  15. printf("It's zero. \n"); //this one
  16. #else
  17. printf("It's not zero. \n");
  18. #endif
  19.  
  20. #if(a0!=0)
  21. printf("It's not zero. \n");
  22. #else
  23. printf("It's zero. \n"); //this one
  24. #endif
  25.  
  26. #if(a1==0)
  27. printf("It's zero. \n"); //this one
  28. #else
  29. printf("It's not zero. \n");
  30. #endif
  31.  
  32. #if(a1!=0)
  33. printf("It's not zero. \n");
  34. #else
  35. printf("It's zero. \n"); //this one
  36. #endif
  37.  
  38. #if(a1==1)
  39. printf("It's one. \n");
  40. #else
  41. printf("It's not one. \n"); //this one
  42. #endif
  43.  
  44. #if(a1!=1)
  45. printf("It's not one. \n"); //this one
  46. #else
  47. printf("It's one. \n");
  48. #endif
  49.  
  50. #if(b==2)
  51. printf("It's two. \n"); //this one
  52. #else
  53. printf("It's not two. \n");
  54. #endif
  55.  
  56. #if(b!=2)
  57. printf("It's not two. \n");
  58. #else
  59. printf("It's two. \n"); //this one
  60. #endif
  61.  
  62.  
  63.  
  64. printf("\n");
  65.  
  66.  
  67.  
  68. if(a0==0)
  69. printf("It's zero. \n"); //this one
  70. else
  71. printf("It's not zero. \n");
  72.  
  73. if(a0!=0)
  74. printf("It's not zero. \n");
  75. else
  76. printf("It's zero. \n"); //this one
  77.  
  78. if(a1==0)
  79. printf("It's zero. \n");
  80. else
  81. printf("It's not zero. \n"); //this one
  82.  
  83. if(a1!=0)
  84. printf("It's not zero. \n"); //this one
  85. else
  86. printf("It's zero. \n");
  87.  
  88. if(a1==1)
  89. printf("It's one. \n"); //this one
  90. else
  91. printf("It's not one. \n");
  92.  
  93. if(a1!=1)
  94. printf("It's not one. \n");
  95. else
  96. printf("It's one. \n"); //this one
  97.  
  98. if(b==2)
  99. printf("It's two. \n"); //this one
  100. else
  101. printf("It's not two. \n");
  102.  
  103. if(b!=2)
  104. printf("It's not two. \n");
  105. else
  106. printf("It's two. \n"); //this one
  107.  
  108. return 0;
  109. }
Success #stdin #stdout 0.01s 5352KB
stdin
Standard input is empty
stdout
It's zero. 
It's zero. 
It's zero. 
It's zero. 
It's not one. 
It's not one. 
It's two. 
It's two. 

It's zero. 
It's zero. 
It's not zero. 
It's not zero. 
It's one. 
It's one. 
It's two. 
It's two.