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  1. #include <cstdio>
  2.  
  3. typedef unsigned char uint8_t;
  4. typedef unsigned int uint32_t;
  5.  
  6. int main() {
  7. 	uint8_t foo = 5;
  8.     uint8_t bar = 250;
  9.  
  10.     // Gives value of 11
  11.     uint8_t diff8bit = foo - bar;
  12.     uint32_t diff1 = static_cast<uint32_t>(diff8bit);
  13.  
  14. 	// Gives value of 4294967051
  15. 	uint32_t diff2 = static_cast<uint32_t>(foo) - static_cast<uint32_t>(bar);
  16.  
  17.     // Gives value of 4294967051
  18.     uint32_t diff3 = static_cast<uint32_t>(foo - bar);
  19.  
  20.     printf("diff1 = %u\n", diff1);
  21.     printf("diff2 = %u\n", diff2);
  22. 	printf("diff3 = %u\n", diff3);
  23.  
  24.     return 0;
  25. }
  26.  
Success #stdin #stdout 0s 3140KB
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stdin
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Standard input is empty
stdout
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diff1 = 11
diff2 = 4294967051
diff3 = 4294967051
https://ideone.com/TwOmTO
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
secret

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