Question

c语言，求π，精确到小数点10位

Answer 1

/*泰勒公式求sin(x)*/
#include
#include
main()
{
double
x,s1,e,s=0;
int
n=1;
printf("输入x和误差范围e:\n");
scanf("%lf
%lf",&x,&e);/*误差上限e要尽量取小，如取e为0.0000001。这里我们将e取为0.000001*/
s1=x;
do
{
s+=s1;
/*s1为中间变量*/
s1=-s1*x*x/(n+1)/(n+2);
n+=2;
}
while
(fabs(s1)>=e);/*fabs为对实数求绝对值的函数*/
printf("x=%lf\nsin(x)=%lf\n",x,s);
}