<span style="font-size:18px;">Scanner input =new Scanner (System.in);
System.out.println("请输入消费金额");
int qian=input.nextInt();
System.out.println("是否参与优惠换购活动:");
if(qian>=50){
System.out.println("1:满50元,加2元换购百事可乐饮料1瓶");
System.out.println("2:满100元,加3元换购500ml可乐1瓶");
System.out.println("3:满100元,加10元换购5公斤面粉");
System.out.println("4:满200元,加10元换购1个苏泊尔炒菜锅一个");
System.out.println("5:满200,加20元换购欧莱雅爽肤水一瓶");
System.out.println("0:不换购");
System.out.println("请选择:");
if(input.hasNextInt()){
int xuanze=input.nextInt();
switch(xuanze){
case 1:
if(qian>50){
System.out.println("消费金额是:"+(qian+2));
System.out.println("成功换购百事可乐饮料1瓶");
}else{
System.out.println("消费不足,无法换购!");
break;
}
case 2:
if(qian>100){
System.out.println("消费金额是:"+(qian+2));
System.out.println("成功换购500ml可乐1瓶");
}else{
System.out.println("消费不足,无法换购!");
break;
}
case 3:
if(qian>100){
System.out.println("消费金额是:"+(qian+10));
System.out.println("成功换购5公斤面粉");
}else{
System.out.println("消费不足,无法换购!");
break;
}
case 4:
if(qian>200){
System.out.println("消费金额是:"+(qian+10));
System.out.println("成功换购1个苏泊尔炒菜锅一个");
}else{
System.out.println("消费不足,无法换购!");
break;
}
case 5:
if(qian>200){
System.out.println("消费金额是:"+(qian+20));
System.out.println("成功换购欧莱雅爽肤水一瓶");
}else{
System.out.println("消费不足,无法换购!");
break;
}
case 0:
System.out.println("不换购");
break;
}
}else{
System.out.println("输入选择错误!");
}</span>
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