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  1. #include <stdio.h>
  2. #include <stdint.h>
  3. #include <inttypes.h>
  4.  
  5. int main(void) {
  6. 	// your code goes here
  7. 	int32_t a=-1;
  8. 	int32_t b=-1;
  9. 	int64_t c = (int64_t)a * b;
  10. 	printf("signed: 0x%016"PRIx64"\n", (uint64_t)c);
  11.  
  12. 	uint32_t d=(uint32_t)-1;
  13. 	uint32_t e=(uint32_t)-1;
  14. 	uint64_t f = (uint64_t)d * e;
  15. 	printf("unsigned: 0x%016"PRIx64"\n", f);
  16.  
  17. 	return 0;
  18. }
  19.  
Success #stdin #stdout 0s 2168KB
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stdin
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Standard input is empty
stdout
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signed: 0x0000000000000001
unsigned: 0xfffffffe00000001
https://ideone.com/k30nZ9
language:
C99 (gcc 8.3)
created:
7 years ago
visibility:
public

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