C/math.h/trunc
trunc: returns the truncated value of arg
//Declaration: float truncf(float arg);
double trunc(double arg);
long double truncl(long double arg);
#include <math.h>
#include <stdio.h>
int main(void)
{
printf("%f\n", trunc (1.2));
return 0;
}
/*1.000000*/