C program to find you got distiction or not

SOURCE CODE:
include<stdio.h>
#include<conio.h>
void main()
{
 float c,e,m,t,p;
 clrscr();
 printf("enter marks of C.P.U. :");
 scanf("%f",&c);
 printf("enter marks of E.E.E. :");
 scanf("%f",&e);

 printf("enter marks of MATHS :");
 scanf("%f",&m);
 t=c+e+m;
 p=t/3;
 printf("\nyour percentag is %f%",p);
 if(p>=70)
 {
  printf("\nyou got distiction.");
 }
 else
  {
   printf("\nyou don't got distiction.");
  }
 getch();
}