Addition and Multiplication by C Programming

//Addition and multiplication of n numbers
#include<stdio.h>
int main()
{
    long n,count,num,a=0,m=1;
    /*Enter user choice of input*/
    printf("How many numbers you want to input: ");
    scanf("%ld",&n);
    /*Read n numbers*/
    printf("Please enter %ld numbers\n",n);
    for(count=1;count<=n;count++)
    {
        scanf("%ld",&num);
        a=a+num;
        m=m*num;
    }
    printf("Addition is %ld\n",a);
    printf("Multiplication is %ld",m);
    return 0;
}