Help with ncurses (int to string)

[toothyXdip]

I'm playing around with ncurses and when I try to print a int variable I get this error:
invalid conversion from ‘int’ to ‘const char*’
initializing argument 4 of ‘int mvwprintw(WINDOW*, int, int, const char*, ...)’

I think it is because I am trying to print a int when its asking for a string but I don't know what to do.

This is my code:

#include <iostream>
#include <ncurses.h>

WINDOW *create_newwin(int height, int width, int starty, int startx);
void destroy_win(WINDOW *local_win);
	
int main(int argc, char *argv[])
{	WINDOW *my_win;
	int startx, starty, width, height;
	int ch;
	int strength;
	int curlvl = 1;
	
	initscr();			/* Start curses mode 		*/
	cbreak();		
					
	keypad(stdscr, TRUE);	

	height = 3;
	width = 10;
	starty = (LINES - height) / 2;	/* Calculating for a center placement */
	startx = (COLS - width) / 2;
	printw("Press F6 to exit");
	refresh();
	if (curlvl = 1){
		strength = 5;
	}
	my_win = create_newwin(height, width, starty, startx);
	while((ch = getch()) != KEY_F(6))
	{	switch(ch)
		{	case KEY_LEFT:
				destroy_win(my_win);
				my_win = create_newwin(height, width, starty,--startx);
				wprintw(my_win, "Hey");
				wrefresh(my_win);
				break;
			case KEY_RIGHT:
				destroy_win(my_win);
				my_win = create_newwin(height, width, starty,++startx);
				break;
			case KEY_UP:
				destroy_win(my_win);
				my_win = create_newwin(height, width, --starty,startx);
				break;
			case KEY_DOWN:
				destroy_win(my_win);
				my_win = create_newwin(height, width, ++starty,startx);
				break;	
			case KEY_F(5):
				destroy_win(my_win);
				break;
			case KEY_F(7):
				my_win = create_newwin(height, width, starty, startx);
				mvwprintw(my_win,1,1, strength);
				wrefresh(my_win);
				break;
		}
	}
	
	endwin();			/* End curses mode		  */
	return 0;
}

WINDOW *create_newwin(int height, int width, int starty, int startx)
{	WINDOW *local_win;

	local_win = newwin(height, width, starty, startx);
	box(local_win, 0 , 0);	
			
	wrefresh(local_win);		/* Show that box 		*/

	return local_win;
}

void destroy_win(WINDOW *local_win)
{	
	wborder(local_win, ' ', ' ', ' ',' ',' ',' ',' ',' ');

	wrefresh(local_win);
	delwin(local_win);
}