6.6.cpp

c入门代码大全

/*求π的近似值*/
#include<stdio.h>
#include<math.h>
int main()
{
    int s;
    float n,t,pi;
    t=1;
    pi=0;
    n=1.0;
    s=1;
    while(fabs(t)>1e-6)
     {
        pi=pi+t;
        n=n+2;
        s=-s;
        t=s/n;
     }
     pi=pi*4;
     printf("%f\n",pi);
     getchar();
}