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  1. #include <stdio.h>
  2.  
  3. // https://stackoverflow.com/a/1343685/5305370
  4.  
  5. int isqrt(int n)
  6. {
  7.   int b = 0;
  8.  
  9.   while(n >= 0)
  10.   {
  11.     n = n - b;
  12.     b = b + 1;
  13.     n = n - b;
  14.   }
  15.  
  16.   return b - 1;
  17. }
  18.  
  19. int main(void) {
  20. 	int a = 9;
  21. 	int b = isqrt(a);
  22. 	printf("a = %d, sqrt(a) = b = %d\n", a, b);
  23. 	return 0;
  24. }
  25.  
Success #stdin #stdout 0s 9424KB
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Standard input is empty
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a = 9, sqrt(a) = b = 3
https://ideone.com/JTeO98
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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