C sum of 2 (2 Lines)

#include<stdio.h>
 int total;int sum(int,int);void main()      {  int a,b;  printf("\n Enter the two numbers : ");  scanf("%d  %d",&a,&b);
  total = sum(a,b);    printf("\n The sum of two numbers is : %d ",total);  getch(); } int sum ( int num1,int num2)     {  int result;    result = num1 + num2 ;  return (result) ;     }