Battleship help!

Okay guys! Maybe you can help me out, I'm making a battleship game. I already did the main assignment so now I'm trying to do the extra credit portion. The extra credit part requires for us to randomly place "different" size ships on the board. I have some constant variables set up but I'm not sure exactly how to go about it. Any suggestions would be nice, I'll link the function below! Thanks for the help! :D

Code:

int randomizeShips(int board[SIZE][SIZE], int num_ships) { int placed_ships=1; int loop=0; int horiz=0; int row, col; srand( (unsigned int) time(0) ); //loop to place three ships. This loop ends when all three ships are placed or the loop has run to many times while ((placed_ships < num_ships+1)&&(loop<100)) { //randomly select horizontal or vertical horiz=rand()%2; //if ship is horizontal: if(horiz==1) {//randomly select row between 0 and size of board row=rand()%SIZE; //randomly select column between 0 and size of board minus size of the ship col=rand()%SIZE-BATTLESHIP; //check all three spaces to make sure nothing is there if((board[row][col]==0)&&(board[row][col+1]==0)&&(board[row][col+2]==0)) { //if nothing is there place the ship and increment loop variable board[row][col]=placed_ships; board[row][col+1]=placed_ships; board[row][col+2]=placed_ships; placed_ships++; } else { loop++; } //if something is there repeat from the beginning } //else else { //randomly select col between 0 and size of board col=rand()%SIZE-BATTLESHIP; //randomly select row between 0 and size of board minus size of the ship row=rand()%SIZE; //check all three spaces to make sure nothing is there if((board[row][col]==0)&&(board[row+1][col]==0)&&(board[row+2][col]==0)) { //if nothing is there place the ship and increment loop variable board[row][col]=placed_ships; board[row+1][col]=placed_ships; board[row+2][col]=placed_ships; placed_ships++; } //if something is there repeat from the beginning else { loop++; } } } //check to see why the loop ended if(loop==100) { printf("\nLoop error, fix it\n"); return -1; } //report to main the results (return -1 if something went wrong) else { return 1; } //if debugging print out hidden board }