Calculator Code Of "C" Language

#include<stdio.h>
main(){
int n1,n2,sum;
printf("Welcome To The Calculator \n");
printf("This Is For Addition \n");
printf("Enter Number 1 \n");
scanf("%d",&n1);
printf("Enter Number 2 \n");
scanf("%d",&n2);
sum=n1+n2;
printf("The Sum Of The The Two number you Entered Is %d \n",sum);
sub();
mul();
div();
}
sub(){
	int s1,s2,sub;
printf("This Is For Subtraction\n");
printf("Enter Number 1 \n");
scanf("%d",&s1);
printf("Enter Number 2 \n");
scanf("%d",&s2);
sub=s1-s2;
printf("The Difference Of The The Two number you Entered Is %d \n",sub);
}
mul(){
	int m1,m2,mul;
printf("This Is For Multiplication \n");
printf("Enter Number 1 \n");
scanf("%d",&m1);
printf("Enter Number 2 \n");
scanf("%d",&m2);
mul=m1*m2;
printf("The Product Of The The Two number you Entered Is %d \n",mul);
}
div(){
	int d1,d2,div;
printf("This Is For Division\n");
printf("Enter Number 1 \n");
scanf("%d",&d1);
printf("Enter Number 2 \n");
scanf("%d",&d2);
div=d1/d2;
printf("Your Reslut Is %d",div