Find the sum of the elements of each row of the matrix

This question requires the preparation of procedures , Find a given m×n The sum of the elements of the matrix .

Input format ：

The first line of input gives two positive integers m and n（1≤m,n≤6）. And then m That's ok , Each line gives n It's an integer , meanwhile

Space off .

Output format ：

Each row outputs the sum of the elements of the corresponding matrix row .

sample input ：

3 2
6 3
1 -8
3 12

sample output ：

9
-7
15

Code ： 

#include <stdio.h>
int main(){
   int lie,hang,sum=0;
    scanf("%d%d",&hang,&lie);
    int a[hang][lie];
    int i,j;
    for(i=0;i<hang;i++){
    	for(j=0;j<lie;j++)scanf("%d",&a[i][j]);
	}
    for(i=0;i<hang;i++){
        for(j=0;j<lie;j++){
            sum=a[i][j]+sum;
        }
        printf("%d\n",sum);
        sum=0;
    }
}