wing wrote:
好答案阿~把這當知識...(恕刪)
有到請人家滾這麼嚴重嗎...
不過太久沒寫可能寫得不好
原 Po 是要 C 啊... 那這作業 0 分
#include <stdio.h>
#include <math.h>
struct Function
{
virtual double operator()(double x) const = 0;
};
struct Square : public Function
{
double operator()(double x) const {return x * x;}
};
struct Cubic : public Function
{
double operator()(double x) const { return x * x * x;}
};
double Integration(const Function & f, double x0, double x1, int fragment)
{
double x(0), sum(0), d((x1-x0)/fragment);
for (int c = 0; c < fragment; x+=d, ++c)
sum += (f( x) + f(x+d)) * d / 2;
return sum;
}
void main()
{
Square s; Cubic c;
printf("answer 4: area = %f\n", Integration(s, 0, 1, 1000));
printf("answer 5: area = %f\n", Integration(c, -.5, 0, 3333) + Integration(c, 0, 1, 6667));
}
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