How to call another function within int main and why it does not work

#include <stdio.h>
int inst;
int play;
int Xs[] = {0,0,0,0,0,0,0,0,0};
int Os[] = {0,0,0,0,0,0,0,0,0};
int Xplay(){
    printf("\%d |%d |%d\n__|__|__\n%d |%d |%d\n__|__|__\n%d |%d | %d\n  |  |\n");
    printf("Type which number you want to occupy");
    scanf("%d", &play);
    Xs[play] = 1;
    if (Xs[play] = 1){

    }
    return 0;
}
int main()
{
    printf("Welcome to Tic-Tac-Toe Text edition!\nPlease type anything to continue the instructions.\n");
        scanf("%d", &inst);
    printf("In order to play, you must enter a number for what square you wish to occupy.\n1 |2 |3\n__|__|__\n4 |5 |6\n__|__|__\n7 |8 | 9\n  |  |\n");
    printf("Please type anything to continue the instructions.\n\n");
        scanf("%d", &inst);
    printf("As you saw above, the numbers each symbolize a place where you can put your X or O. In order to do so, all you have to do is type the number in which you want to put your X or O\n\n");
    printf("Please type anything to continue the instructions.\n\n");
        scanf("%d", &inst);
    printf("That is all you need to know to play!\nType anything to play!\n");
        scanf("%d", &inst);
Xplay();
    return 0;
}