#include <iostream>
#include <cmath>
#define PI = 3.141592
#define h = 1 - 3.141592/4

double main()
{
    double x;
    double fx1;
 double fx2;
 double a;
 double b;
 double initial = 0.841470984807897;
 int q;
 double et;
    double error = 1.0;            
    double err = 0.0005;   // 구할려는 오차
    int i = 1;             // 실행 횟수 저장

    printf(" No      f(xi+1)         e_a        e_t\\n");
 
    while(error > err)
    {
        fx1 = initial;
  
  for (i=1; i++; q=q*i)
  {
  a = cos(1)* ( pow(-1,i) - 1)/2 * pow(-1,(i+1)/2) /q * pow(h,i);
  b = sin(1)* ( pow(-1,i) + 1)/2 * pow(-1,i/2) /q * pow(h,i);
  fx2 = fx1 + a + b ;
       
        error = fx2 - fx1;
  et = fx2 - sin(3.141592/4);
       
        printf("%2d  %9.6lf  %9.6lf  %9.6lf\\n", i++, fx2, error, et);

        return fx1 = fx2 ;
  }
    }
}

a,b 각각 에러가 3개씩 총 6개가 떠요 ㅠ
C:\\Documents and Settings\\Owner\\바탕 화면\\JY\\numerical_method_HW1.cpp(31) : error C2143: syntax error : missing \')\' before \'=\'
C:\\Documents and Settings\\Owner\\바탕 화면\\JY\\numerical_method_HW1.cpp(31) : error C2660: \'pow\' : function does not take 0 parameters
C:\\Documents and Settings\\Owner\\바탕 화면\\JY\\numerical_method_HW1.cpp(31) : error C2059: syntax error : \')\'
C:\\Documents and Settings\\Owner\\바탕 화면\\JY\\numerical_method_HW1.cpp(32) : error C2143: syntax error : missing \')\' before \'=\'
C:\\Documents and Settings\\Owner\\바탕 화면\\JY\\numerical_method_HW1.cpp(32) : error C2660: \'pow\' : function does not take 0 parameters
C:\\Documents and Settings\\Owner\\바탕 화면\\JY\\numerical_method_HW1.cpp(32) : error C2059: syntax error : \')\'


도대체 뭐가 문제일까요 ㅠㅠㅠ