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#2
纯蓝之刃2019-11-20 21:22
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利用公式π/4 = 1-1/3+1/5-1/7……计算π,直到最后一项的绝对值小于10的负6次方为止
程序代码：#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main()
{
int n = 1;
int sign = 1;
double pi = 0;
double eps = 1.0 / n; //最后一项
while(fabs(eps) >= 1e-6)
{
pi += sign * eps;
n += 2;
sign *= -1;
eps = sign * 1.0 / n;
}
pi *= 4;
printf("pi = %.4f\n", pi);
return 0;
}
#include<stdlib.h>
#include<math.h>
int main()
{
int n = 1;
int sign = 1;
double pi = 0;
double eps = 1.0 / n; //最后一项
while(fabs(eps) >= 1e-6)
{
pi += sign * eps;
n += 2;
sign *= -1;
eps = sign * 1.0 / n;
}
pi *= 4;
printf("pi = %.4f\n", pi);
return 0;
}
请问问题出在哪，我的结果是pi = 30.1717
，，，，，一时眼花， 感谢！！！