C Program to calculate area of trapezium

#include<stdio.h>
#include<conio.h>
void main()
{float parallelsideone, parallelsideTwo,height,area;
printf("enter the length of parallel side of trapezium\n");
scanf("%f %f",& parallelsideone, parallelsideTwo);
printf("enter the height\n");
scanf("%f ",&height);
area=1.0\2*(parallelsideone+parallelsideTwo)*height;
printf("area of trapezium : %0.4f\n",area);
getch();
}