#include<stdio.h>
#include<conio.h>
#include<math.h>

float y(float );
void main()
{
unsigned int dp;
float xi,xf;
clrscr();
printf("Enter the No. of Data points ");
scanf("%u", &dp);
printf("Enter the Starting & ending \"X\" Values: ");
scanf("%f %f",&xi, &xf);
float step = (float) ((xf - xi) / dp);
float integral=0.0, temp;
for(int i=1; i<dp; i++)
	{
	temp=xi + i*step;
	integral += y(temp);
	}
integral *= 2;
integral = integral + y(xi) +y(xf);
integral = integral * step / 2;
printf("\n\nThe Ans. of the Integral is: %8.4f",integral);
integral = pow(10,3) + pow(10,2) + log(11);
printf("\nAnalytical Value is: %8.4f",integral);
}

float y(float x) //f(x)
{
float temp;
temp = 3*x*x + 2*x + (1 / (1 + x) );
return temp;
}