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#include<stdio.h>
#include<math.h>
 
char g[3][3];
 
void reset() {
	for(int i = 0; i < 3; i++)
		for (int j = 0; j < 3; j++)
			g[i][j] = ' ';
}
 
int display(void)
{
 printf("%c|%c|%c",g[0][0],g[0][1],g[0][2]);
 printf("------------");
 printf("%c|%c|%c",g[1][0],g[1][1],g[1][2]);
 printf("------------");
 printf("%c|%c|%c",g[2][0],g[2][1],g[2][2]);
 }
 
 int start()
 {
	printf("Enter coordinates for move");
	scanf(%d %d,&i &j);
	g[i+1][j+1]= X;
 
 int main()
 {
	reset();
	display();
	printf("X starts the game");
	start();
	return 0;
 }

prog.c: In function ‘start’:
prog.c:24:8: error: expected expression before ‘%’ token
  scanf(%d %d,&i &j);
        ^
prog.c:25:4: error: ‘i’ undeclared (first use in this function)
  g[i+1][j+1]= X;
    ^
prog.c:25:4: note: each undeclared identifier is reported only once for each function it appears in
prog.c:25:9: error: ‘j’ undeclared (first use in this function)
  g[i+1][j+1]= X;
         ^
prog.c:25:15: error: ‘X’ undeclared (first use in this function)
  g[i+1][j+1]= X;
               ^
prog.c:27:6: warning: ‘main’ is normally a non-static function [-Wmain]
  int main()
      ^~~~
prog.c:34:2: error: expected declaration or statement at end of input
  }
  ^
prog.c: In function ‘display’:
prog.c:19:2: warning: control reaches end of non-void function [-Wreturn-type]
  }
  ^
prog.c: In function ‘start’:
prog.c:34:2: warning: control reaches end of non-void function [-Wreturn-type]
  }
  ^
At top level:
prog.c:27:6: warning: ‘main’ defined but not used [-Wunused-function]
  int main()
      ^~~~

Standard output is empty