#include<stdio.h>
#include<math.h>
float valueFx(float x);
float valueGx(float x);
float areaBetweenCurve(int a,int b,float deltaX);
int main()
{
  int a = -2,b=2;
  //printf("Enter the boundary values : a,b ");
  //scanf("%d,%d",&a,&b);
  
  float delX = 0.001;
  printf("Area of curve : %f \n",areaBetweenCurve(a,b,delX));
  printf("Area of broken curve : %f \n", areaBetweenCurve(a,0,delX) + areaBetweenCurve(0,b,delX) );
  return 0;
}
float valueFx(float x)
{
  return -1 * x* x + 3*x;
}
float valueGx(float x)
{
  return 2*x*x*x - x*x - 5*x;
}
float areaBetweenCurve(int a,int b,float deltaX)
{
  float lowX = a,highX = a + deltaX,area = 0.0;
  while(highX <= b)
  {
    //printf("lowX : %f  HighX : %f \n",lowX,highX);
    if(lowX < 0 && highX > 0)
    {
      //printf("HOw : lowX : %f  HighX : %f \n",lowX,highX);
      area += (0 - lowX) * fabs(valueFx(lowX) - valueGx(lowX)) +  (highX - 0) * fabs(valueFx(1) - valueGx(1));
    }
    area += (highX-lowX)*fabs(valueFx(lowX) - valueGx(lowX));
    
    lowX = highX;
    highX = highX + deltaX;
  }
  if(lowX < b && highX > b)
  {
    area += (b-lowX)*fabs(valueFx(lowX) - valueGx(lowX) );
  }
  return area;
}