itrunc, uitrunc - Truncate a floating-point number
int itrunc(
double x);
unsigned int uitrunc(
double x);
The itrunc function returns the signed integer nearest to the double-precision floating value x in the direction of 0.0. This effectively truncates x by discarding its fraction component. The uitrunc function also truncates the double x, but returns an unsigned integer value.
If x is a NaN or a negative value that exceeds the size of a signed integer, itrunc returns INT_MIN. If x is a positive value that exceeds the size of a signed integer, itrunc returns INT_MAX.
If x is a NaN or a negative value that exceeds the size of an unsigned integer, uitrunc returns a zero. If x is a positive value that exceeds the size of an unsigned integer, itrunc returns UINT_MAX.
Files: limits.h, math.h, float.h, fp.h, machine/fpu.h.
IEEE Standard for Binary Floating-Point Arithmetic delim off