#include<stdio.h>
#include<conio.h>
void main ()
{
int m1,m2,m3,tm;
clrscr ();
printf ("Enter M1:  ");
scanf ("%d",&m1);
printf ("Enter M2:  ");
scanf ("%d",&m2);
printf ("Enter M3:  ");
scanf ("%d",&m3);
tm=m1+m2+m3;
printf ("\nTotal Marks are:  %d",tm);
getch ();
}

OUTPUT
Enter M1:  70
Enter M1:  64
Enter M1:  75

Total Marks are: 209