public void gotOper(char opThis, int prec1){
		while(!stack.isEmpty()){
			char opTop = (char) stack.pop();
			if(opTop == '('){
				stack.push(opTop);
				break;
			}else {
				int prec2;
				if(opTop == '-' || opTop == '+'){
					prec2 = 1;
				}else {
					prec2 = 2;
				}
				if(prec2 < prec1){
					stack.push(opTop);
					break;
				}else {
					output = output + opTop;
				}
				
			}
		}
		stack.push(opThis);
	}