✨ support compile error msg

[crossoverJie]

• Compile message.
• Recursion function.
• print()

example: print_triangle.gs

int num(int x,int y){
	if (y==1 || y ==x) {
		return 1;
	}
    int v1 = num(x - 1, y - 1);
    int v2 = num(x - 1, y);
	int c = v1+v2;
    // int c = num(x - 1, y - 1)+num(x - 1, y);
	return c;
}

printTriangle(int row){
	for (int i = 1; i <= row; i++) {
        for (int j = 1; j <= row - i; j++) {
           print(" ");
        }
        for (int j = 1; j <= i; j++) {
            print(num(i, j) + " ");
        }
        println("");
    }
}

printTriangle(7);

      1 
     1 1 
    1 2 1 
   1 3 3 1 
  1 4 6 4 1 
 1 5 10 10 5 1 
1 6 15 20 15 6 1