#include <math.h>
#include <stdio.h>

double ToHalfAdjust(double dValue, int iDigits)
{
	double dCoef;
	
	dCoef = pow(10, iDigits);
	
	return dValue > 0 ? floor(dValue * dCoef + 0.5) / dCoef: ceil(dValue * dCoef - 0.5) / dCoef;

} 

void MathToHalfAdjust(void)
{
	double dst;
	
	dst = ToHalfAdjust(12.325, 2);
	printf("%f\n", dst); /* 12.33 */
}

int main(void)
{
	MathToHalfAdjust();
	
	return 0;
}