Modified Euler’s Method

Modified Euler’s Method

#include<stdio.h>
#include<conio.h>
#define F(x) x+y
int main (void)
{
   float a,c,b,h,x,f,i,y,y1,y11=0.01,m,n,f2;
   clrscr();
   printf("Enter the value of a & c as y(a)=c: ");
   scanf("%f %f",&a,&c);
   printf("Enter the value of b as y(b)=?");
   scanf("%f",&b);
   printf("Enter the value of h: ");
   scanf("%f",&h);
   x=a;
   y=c;
   for(i=a;i<b;i=i+h)
   {
      f= F(x);
   	y1=c+ h*f;
      x=x+h;
      y=y1;
      m=0.0001;n=0.0 ;
      while(m>=n)
      {
         m=y;                  //primarry
         f2=F(x);
         y11=c+h*(f+f2)/2;
			y=y11;
         m=y11;

         f2=F(x);              //secondary
         y11=c+h*(f+f2)/2;
			y=y11;
         n=y11;

      }
      c=y11;
      y=y11;
   }
   printf("\nRequired ans: %f",c);
   getch();
   return 0;
}