Hi, In a graph problem, I need to memset a whole 2D array with a large value that denotes INFINITY.

Currently, I am doing this by running a O(N*N) loop.

const int maxx = something;
int grid[maxx+7][maxx+7];
for(int i=0;i<maxx;i++){
   for(int j=0;j<maxx;j++){
      grid[i][j] = large_value;
   }
}

Is there a better way to do this?

Also, I have tried memset function.

memset(grid,127,sizeof grid) resets all values to 2139062143

memset(grid,128,sizeof grid) resets all values to -2139062144

Why memset works like this?

Thanks in advance!