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  1. #include <iostream>
  2. #include <stdint.h>
  3.  
  4. void a()
  5. {
  6.         uint32_t i;
  7.         *(volatile uint32_t *)&i = 42;
  8.  
  9.         volatile uint8_t * c = reinterpret_cast<volatile uint8_t *>(&i);
  10.         c[0] = 0;
  11.         c[1] = 0;
  12.         c[2] = 0;
  13.         c[3] = 0;
  14.  
  15.         std::cout << "i = " << *(volatile int *)&i << std::endl;
  16. }
  17.  
  18. void b()
  19. {
  20.         uint32_t i;
  21.         *(volatile uint32_t *)&i = 42;
  22.  
  23.         volatile uint16_t * s = reinterpret_cast<volatile uint16_t *>(&i);
  24.         s[0] = 0;
  25.         s[1] = 0;
  26.  
  27.         std::cout << "i = " << *(volatile uint32_t *)&i << std::endl;
  28. }
  29.  
  30. int main()
  31. {
  32. 	a();
  33. 	b();
  34. }
Success #stdin #stdout 0s 2852KB
comments (?)
stdin 
Standard input is empty
stdout 
i = 0
i = 0
https://ideone.com/zPjIfH
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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