int abs (int n) - 정수 n의 절대값.
double acos(double x) - Compute arc cosine of x.
double asin(double x) - Compute arc sine of x.
double atan(double x) - Compute arc tangent of x.
double atan2(double y, double x) - Compute arc tangent of y/x.
double ceil(double x) - Get smallest integral value that exceeds x.
double cos(double x) - Compute cosine of angle in radians.
double cosh(double x) - Compute the hyperbolic cosine of x.
div_t div(int number, int denom) - Divide one integer by another.
double exp(double x - Compute exponential of x.
double fabs (double x ) - Compute absolute value of x.
double floor(double x) - Get largest integral value less than x.
double fmod(double x, double y) - Divide x by y with integral quotient and return remainder.
double frexp(double x, int *expptr) - Breaks down x into mantissa and exponent of no.
long labs(long n) - Find absolute v alue of long integer n.
double ldexp(double x, int exp) - Reconstructs x out of mantissa and exponent of two.
ldiv_t ldiv(long number, long denom) - Divide one long integer by another.
double log(double x) - Compute log(x).
double log10 (double x ) - Compute log to the base 10 of x.
double modf(double x, double *intptr) - Breaks x into fractional and integer parts.
double pow (double x, double y) - Compute x raised to the power y.
int rand (void) - Get a random integer between 0 and 32.
int random(int max_num) - Get a random integer between 0 and max_num.
void randomize(void) - Set a random seed for the random number generator.
double sin(double x) - Compute sine of angle in radians.
double sinh(double x) - Compute the hyperbolic sine of x.
double sqrt(double x) - Compute the square root of x.
void srand(unsigned seed) - Set a new seed for the random number generator (rand).
double tan(double x) - Compute tangent of angle in radians.
double tanh(double x) - Compute the hyperbolic tangent of x.