求分析

//谁能分析一下这两种求值顺序对结果的影响#include<stdio.h>#include<math.h>int main(){         double pi = 0,i=1,temp = 1;    int count1 = 1,count2 = 0;//3.141591    while(fabs(temp)>=1e-6)    {         pi += temp;         i = i+2;         temp = pow(-1,count1++)*1.0/i;     } //3.141595    //while(fabs(temp)>=1e-6)    //{    //  temp = pow(-1,count2++)*1.0/i;    //  pi += temp;      //  i = i+2;    //}    pi = pi*4;    printf("%.6f",pi);                 return 0;}