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  1. #include <stdio.h>
  2. #include <stdint.h>
  3. #include <stdlib.h>
  4.  
  5. typedef uint8_t  u8;
  6. typedef uint64_t u64;
  7.  
  8. // I don't know if this supports 64 bit printf so I did it myself
  9. u64 ipow(u64 base, u64 exp){ // stolen from stackoverflow
  10. 	u64 result = 1;
  11. 	while(exp>0){
  12. 		if(exp & 1) result = (result * base);
  13. 		exp = (exp >> 1);
  14. 		base = (base * base);
  15. 	}
  16. 	return result;}
  17.  
  18. void print64(u64* number){
  19. 	const u8 charlut[]  = "0123456789ABCDEF";
  20. 	u8 i=19U;
  21. 	while(1){
  22. 		putchar(charlut[(*number / ipow(10,i)) % 10]);
  23. 		if(!i) break;
  24. 		i--;
  25. 	}}
  26. //end horrible code
  27.  
  28. int main(void){
  29. 	u64 size = 1;
  30. 	u8* memoryblock = (u8*)0;
  31. 	while( realloc(memoryblock, size) ){
  32. 		printf("Allocated "); print64(&size); printf(" bytes...\n");
  33. 		size = (size << 1);
  34. 	}
  35. 	printf("Allocate  "); print64(&size); printf(" bytes failed\n");
  36. 	free(memoryblock);
  37. 	return 0;}
Success #stdin #stdout 0s 527360KB
comments ()
stdin
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Standard input is empty
stdout
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Allocated 00000000000000000001 bytes...
Allocated 00000000000000000002 bytes...
Allocated 00000000000000000004 bytes...
Allocated 00000000000000000008 bytes...
Allocated 00000000000000000016 bytes...
Allocated 00000000000000000032 bytes...
Allocated 00000000000000000064 bytes...
Allocated 00000000000000000128 bytes...
Allocated 00000000000000000256 bytes...
Allocated 00000000000000000512 bytes...
Allocated 00000000000000001024 bytes...
Allocated 00000000000000002048 bytes...
Allocated 00000000000000004096 bytes...
Allocated 00000000000000008192 bytes...
Allocated 00000000000000016384 bytes...
Allocated 00000000000000032768 bytes...
Allocated 00000000000000065536 bytes...
Allocated 00000000000000131072 bytes...
Allocated 00000000000000262144 bytes...
Allocated 00000000000000524288 bytes...
Allocated 00000000000001048576 bytes...
Allocated 00000000000002097152 bytes...
Allocated 00000000000004194304 bytes...
Allocated 00000000000008388608 bytes...
Allocated 00000000000016777216 bytes...
Allocated 00000000000033554432 bytes...
Allocated 00000000000067108864 bytes...
Allocated 00000000000134217728 bytes...
Allocated 00000000000268435456 bytes...
Allocate  00000000000536870912 bytes failed
https://ideone.com/h2Ffer
language:
C99 (gcc 8.3)
created:
10 years ago
visibility:
public

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