Clear an int[x][y] array in Objective-C

I am working on a iPhone game. Everything is working fine, but what is the correnct way to reset a array of ints in Objective-C? The array holds the coordinates for walls in each level. The array is set, every time a new level is loaded - But how can i开发者_JAVA技巧 "clear" the array?

LevelData.h

int wallH[50][2];
int wallV[50][2];

LevelData.m

-(void)setLevelOne {

    // (50, 70)
    wallH[0][0] = 50;
    wallH[0][1] = 70;

    // (50, 90)
    wallH[1][0] = 50;
    wallH[1][1] = 90;

    // And so on ...
    // The same for wallV (Vertical walls in the level)
}

How can I "clear" the array, so it's ready for the next level? [wallH release] doesn't work - We are talking about a c array :/

You can zero array using memset function (in your case you know the number of elements in array so you can use "hardcoded" 100 determining size):

memset(wallH, 0, 100*sizeof(wallH[0][0]);