比较简单，代码如下

#include<iostream>
#include<cstdio>
#include<bits/stdc++.h>
#include<windows.h>
using namespace std;
int main(){
int a=0,sheng=20,gong=10,fang=10,b,shengm=20,yao=0;
int guais,guaig,qian=0,c;
while(a==0){
cout<<"1.勇者商店"<<endl; 
cout<<"2.讨伐魔物"<<endl;
cout<<"3.角色资料"<<endl;
cout<<"请选择..."<<endl;
cout<<endl;
cin>>b;
if(b==1){
cout<<"1.装备"<<endl; 
cout<<"2.药品"<<endl;
cout<<"输入0退出"<<endl;
cout<<endl;
cin>>b;
if(b==1){
while(b!=0){
cout<<"1.武器"<<endl;
cout<<"2.盾牌"<<endl;
cout<<"3.盔甲"<<endl;
cout<<"输入0退出"<<endl;
cout<<endl;
cin>>b;
if(b==1){
cout<<"1.骑士长剑（+10） 价值：20"<<endl;
cout<<"2.石中剑（+20） 价值40"<<endl;
cout<<"3.魔王的右手（+90） 价值150"<<endl;
cout<<"输入4退出"<<endl;
cout<<endl;
cin>>b;
if(b==1&&qian>=20){
gong+=10;
qian-=20;
cout<<"自身攻击"<<gong<<endl;
}
if(b==2&&qian>=40){
gong+=20;
qian-=40;
cout<<"自身攻击"<<gong<<endl;
}
if(b==3&&qian>=150){
gong+=90;
qian-=150;
cout<<"自身攻击"<<gong<<endl;
}
}
if(b==2){
cout<<"1.皇家盾牌（+10） 价值：20"<<endl;
cout<<"2.永恒堡垒（+20） 价值40"<<endl;
cout<<"3.魔王的左手（+90） 价值150"<<endl;
cout<<"输入4退出"<<endl;
cout<<endl;
cin>>b;
if(b==1&&qian>=20){
fang+=10;
qian-=20;
cout<<"自身防御"<<fang<<endl;
}
if(b==2&&qian>=40){
fang+=20;
qian-=40;
cout<<"自身防御"<<fang<<endl;
}
if(b==3&&qian>=150){
fang+=90;
qian-=150;
cout<<"自身防御"<<fang<<endl;
}
}
if(b==3){
cout<<"1.战争盔甲（+10） 价值：20"<<endl;
cout<<"2.不灭龙甲（+20） 价值40"<<endl;
cout<<"3.魔王的精华（+90） 价值150"<<endl;
cout<<"输入4退出"<<endl;
cout<<endl;
cin>>b;
if(b==1&&qian>=20){
shengm+=10;
qian-=20;
cout<<"自身生命"<<shengm<<endl;
}
if(b==2&&qian>=40){
shengm+=20;
qian-=40;
cout<<"自身生命"<<shengm<<endl;
}
if(b==3&&qian>=150){
shengm+=90;
qian-=150;
cout<<"自身生命"<<shengm<<endl;
}
}
}
}
if(b==2){
cout<<"1.快速回复（花费1）"<<endl;
cout<<"2.恢复药剂（花费5）*5"<<endl;
cout<<"输入0退出"<<endl;
cout<<endl;
cin>>b;
if(b==1&&qian>=1){
sheng=shengm;
qian--;
cout<<"自身生命"<<sheng<<endl;
}
if(b==2&&qian>=5){
yao=yao+5;
cout<<"药品数量"<<yao<<endl;
}
}
}
else if(b==2){
cout<<"1.小怪"<<endl;
if(gong>=15){
cout<<"2.魔头"<<endl;
if(gong>=20){
cout<<"3.大魔王"<<endl;
cout<<"输入0退出"<<endl;
cout<<endl;
cin>>b;
}
else{
cout<<"输入0退出"<<endl;
cout<<endl;
cin>>b;
} 
}
else{
cout<<"输入0退出"<<endl;
cout<<endl;
cin>>b;
} 
if(b==1){
guais=30;
guaig=5;
c=5;
while(guais>0&&sheng>0){
cout<<"1.攻击"<<endl; 
cout<<"2.防御（次数"<<c<<"）"<<endl;
cout<<"3.回复（闪避）"<<endl;
cout<<endl;
cin>>b;	
if(b==1){
guais=guais-gong;
sheng=sheng-guaig;
cout<<"怪物生命"<<"-"<<gong<<"="<<guais<<endl;
cout<<"自身生命"<<"-"<<guaig<<"="<<sheng<<endl;
}
if(b==2&&c!=0){
if(fang>=guaig){
guais=guais-(fang-guaig);
cout<<"怪物生命"<<"-"<<fang-guaig<<"="<<guais<<endl;
}
else{
sheng=sheng-(guaig-fang);
cout<<"自身生命"<<"-"<<guaig-fang<<"="<<sheng<<endl;
}
c--;
}
if(b==3&&yao>0){
yao--;
sheng=sheng+20;
if(sheng>shengm)sheng=shengm;
cout<<"药品数量"<<yao<<endl;
cout<<"自身生命+20（"<<sheng<<"）"<<endl;
}
if(sheng<=0){
cout<<"你死了"<<endl;
break;
}
}
if(sheng>0){
qian=qian+2;
cout<<"金币"<<"+2"<<endl;
}
cout<<endl;	
}
if(b==2){
guais=50;
guaig=10;
c=7;
while(guais>0&&sheng>0){
cout<<"1.攻击"<<endl; 
cout<<"2.防御（次数"<<c<<"）"<<endl;
cout<<"3.回复（闪避）"<<endl;
cout<<endl;
cin>>b;	
if(b==1){
guais=guais-gong;
sheng=sheng-guaig;
cout<<"怪物生命"<<"-"<<gong<<"="<<guais<<endl;
cout<<"自身生命"<<"-"<<guaig<<"="<<sheng<<endl;
}
if(b==2&&c!=0){
if(fang>=guaig){
guais=guais-(fang-guaig);
cout<<"怪物生命"<<"-"<<fang-guaig<<"="<<guais<<endl;
}
else{
sheng=sheng-(guaig-fang);
cout<<"自身生命"<<"-"<<guaig-fang<<"="<<sheng<<endl;
}
c--;
}
if(b==3&&yao>0){
yao--;
sheng=sheng+20;
if(sheng>shengm)sheng=shengm;
cout<<"药品数量"<<yao<<endl;
cout<<"自身生命+20（"<<sheng<<"）"<<endl;
}
if(sheng<=0){
cout<<"你死了"<<endl;
break;
}
}
if(sheng>0){
qian=qian+10;
cout<<"金币"<<"+10"<<endl;
}
cout<<endl;	
}
if(b==3){
guais=100;
guaig=20;
c=15;
while(guais>0&&sheng>0){
cout<<"1.攻击"<<endl; 
cout<<"2.防御（次数"<<c<<"）"<<endl;
cout<<"3.回复（闪避）"<<endl;
cout<<endl;
cin>>b;	
if(b==1){
guais=guais-gong;
sheng=sheng-guaig;
cout<<"怪物生命"<<"-"<<gong<<"="<<guais<<endl;
cout<<"自身生命"<<"-"<<guaig<<"="<<sheng<<endl;
}
if(b==2&&c!=0){
if(fang>=guaig){
guais=guais-(fang-guaig);
cout<<"怪物生命"<<"-"<<fang-guaig<<"="<<guais<<endl;
}
else{
sheng=sheng-(guaig-fang);
cout<<"自身生命"<<"-"<<guaig-fang<<"="<<sheng<<endl;
}
c--;
}
if(b==3&&yao>0){
yao--;
sheng=sheng+20;
if(sheng>shengm)sheng=shengm;
cout<<"药品数量"<<yao<<endl;
cout<<"自身生命+20（"<<sheng<<"）"<<endl;
}
if(sheng<=0){
cout<<"你死了"<<endl;
break;
}
}
if(sheng>0){
qian=qian+100;
cout<<"金币"<<"+100"<<endl;
}
cout<<endl;	
}
}
else if(b==3){
printf("请稍后");
for(int i=1;i<=5;i++){
printf(".");
Sleep(500);
}
printf("\n自身资料\n");
printf("----------------------------------------------\n");
printf("生命: %d ",sheng);
printf("攻击: %d\n\n",gong);
printf("防御: %d ",fang);
printf("生命上限: %d\n\n",shengm);
printf("金币: %d ",qian);
cout<<endl<<endl;
}
}
return 0;
}