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2.1.17.4.2 ocmath_function_integral

1 Description
2 Syntax
3 Parameters
4 Return
5 Examples
6 Remark
7 See Also
8 Header to Include
9 Reference

Description

Perform integral on specified function in the given data range. It can be used for improper integral like infinite integral.

Syntax

double ocmath_function_integral( double a, double b, EVALUATFUNC func, LPVOID pPara, double precision = 10e-8 )

Parameters

a: [input] lower limit of the integral
b: [input] upper limit of the integral
func: [input] pointer to the function to be integrated
pPara: [input] pointer to the parameters list of the function
precision: [input] the precision of the integral, default is 1e-8

Return

Return the integral value

Examples

EX1

double sin_a(double x, LPVOID pa)
{
    return sin(*(double*)pa*x);
}
void ocmath_function_integral_ex1()
{
    double a = PI;
    double dd = ocmath_function_integral(0, 1, sin_a, (LPVOID)&a);
    printf ("%lf\n", dd);
}

Remark

Header to Include

origin.h