Question

用C语言计算微积分？

可以的话举一些例子！！！

Answer 1

其实就是求黎曼和。
double x, pi, sum=0.0;
int i;
long N=100000;
sum = 0.0;
step = 1./(double)N;

for (i=0; i<N; i++)
{
x = (i + .5)*step;
sum = sum + 4.0/(1.+ x*x);
}
pi = sum*step;

Answer 2

其实就是求黎曼和。
double x, pi, sum=0.0;
int i;
long N=100000;
sum = 0.0;
step = 1./(double)N;

for (i=0; i<N; i++)
{
x = (i + .5)*step;
sum = sum + 4.0/(1.+ x*x);
}
pi = sum*step;