Can anyone teach me how to assign a empty array to zero? Which means that some of the

c[x][y] have not assigned to a value.

```
int x = 4;
int y = 4;
a[x] = {30,40,50,60};
b[y] = {100,20,60,40};
c[x][y];
int i = 0;
int j = 0;
while(i<x && j<y){
if(a[i]<b[j]){
c[i][j] = a[i];
}
}
```