PROGRAM FOR TRAPEZOIDAL RULE

/*PROGRAM FOR TRAPEZOIDAL RULE*/

#include<stdio.h>

#include<conio.h>

void main()

{

int n,i;

float x0,xf,y,h;

float f(float);

clrscr();

printf("\n\nEnter the values of x0 & xf::");

scanf("%f%f",&x0,&xf);

printf("\n\nEnter the values of n::");

scanf("%d",&n);

h=(xf-x0)/n;

y=f(x0)+f(xf);

for(i=1;i<=n-1;i++)

{

y=y+2*f(x0+i*h);

}

y=y*h/2;

printf("\n\nThe result is::%f",y);

getch();

}

float f(float x)

{

return(1/(1+x*x));

}

/* ******************OUTPUT*****************

Enter the values of x0 & xf::0

1

Enter the values of n::6

The result is::0.784241*/