Question

do—while循环的应用：利用下述公式求π的近似值,要求满足计算精度为0.0001π/4≈1-1/3+1/5-1/7+

Answer 1

代码：

#include

int main()

{

double sum=0;

int n=1;

int sign=1;

do

{

sum=sum+sign*1.0/n;

n=n+2;

sign=-sign;

}

while(1.0/n>=0.0001);

printf("π/4≈%.4fn",sum);

return 0;

}

运行结果：

π/4≈0.7853

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