Hàm toán học C++
Hàm toán học C++
Thư viện <cmath> có nhiều hàm cho phép bạn thực hiện các tác vụ toán học trên các con số.
Một danh sách tất cả các hàm toán học có thể được tìm thấy trong bảng dưới đây:
| Function | Description |
|---|---|
| abs(x) | Returns the absolute value of x |
| acos(x) | Returns the arccosine of x, in radians |
| acosh(x) | Returns the hyperbolic arccosine of x |
| asin(x) | Returns the arcsine of x, in radians |
| asinh(x) | Returns the hyperbolic arcsine of x |
| atan(x) | Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians |
| atan2(y, x) | Returns the angle theta from the conversion of rectangular coordinates (x, y) to polar coordinates (r, theta) |
| atanh(x) | Returns the hyperbolic arctangent of x |
| cbrt(x) | Returns the cube root of x |
| ceil(x) | Returns the value of x rounded up to its nearest integer |
| copysign(x, y) | Returns the first floating point x with the sign of the second floating point y |
| cos(x) | Returns the cosine of x (x is in radians) |
| cosh(x) | Returns the hyperbolic cosine of x |
| exp(x) | Returns the value of E x |
| exp2(x) | Returns the value of 2 x |
| expm1(x) | Returns e x -1 |
| erf(x) | Returns the value of the error function at x |
| erfc(x) | Returns the value of the complementary error function at x |
| fabs(x) | Returns the absolute value of a floating x |
| fdim(x) | Returns the positive difference between x and y |
| floor(x) | Returns the value of x rounded down to its nearest integer |
| fma(x, y, z) | Returns x*y+z without losing precision |
| fmax(x, y) | Returns the highest value of a floating x and y |
| fmin(x, y) | Returns the lowest value of a floating x and y |
| fmod(x, y) | Returns the floating point remainder of x/y |
| frexp(x, y) | With x expressed as m*2 n , returns the value of m (a value between 0.5 and 1.0) and writes the value of n to the memory at the pointer y |
| hypot(x, y) | Returns sqrt(x 2 +y 2 ) without intermediate overflow or underflow |
| ilogb(x) | Returns the integer part of the floating-point base logarithm of x |
| ldexp(x, y) | Returns x*2 y |
| lgamma(x) | Returns the logarithm of the absolute value of the gamma function at x |
| llrint(x) | Rounds x to a nearby integer and returns the result as a long long integer |
| llround(x) | Rounds x to the nearest integer and returns the result as a long long integer |
| log(x) | Returns the natural logarithm of x |
| log10(x) | Returns the base 10 logarithm of x |
| log1p(x) | Returns the natural logarithm of x+1 |
| log2(x) | Returns the base 2 logarithm of the absolute value of x |
| logb(x) | Returns the floating-point base logarithm of the absolute value of x |
| lrint(x) | Rounds x to a nearby integer and returns the result as a long integer |
| lround(x) | Rounds x to the nearest integer and returns the result as a long integer |
| modf(x, y) | Returns the decimal part of x and writes the integer part to the memory at the pointer y |
| nan(s) | Returns a NaN (Not a Number) value |
| nearbyint(x) | Returns x rounded to a nearby integer |
| nextafter(x, y) | Returns the closest floating point number to x in the direction of y |
| nexttoward(x, y) | Returns the closest floating point number to x in the direction of y |
| pow(x, y) | Returns the value of x to the power of y |
| remainder(x, y) | Return the remainder of x/y rounded to the nearest integer |
| remquo(x, y, z) | Calculates x/y rounded to the nearest integer, writes the result to the memory at the pointer z and returns the remainder. |
| rint(x) | Returns x rounded to a nearby integer |
| round(x) | Returns x rounded to the nearest integer |
| scalbln(x, y) | Returns x*R y (R is usually 2) |
| scalbn(x, y) | Returns x*R y (R is usually 2) |
| sin(x) | Returns the sine of x (x is in radians) |
| sinh(x) | Returns the hyperbolic sine of x |
| sqrt(x) | Returns the square root of x |
| tan(x) | Returns the tangent of x (x is in radians) |
| tanh(x) | Returns the hyperbolic tangent of x |
| tgamma(x) | Returns the value of the gamma function at x |
| trunc(x) | Returns the integer part of x |
