知识框架

No.0 筑基

请先学习下知识点，道友！
题目知识点大部分来源于此：

题目例题大部分来源于此：

No.1 条件判断

题目来源：PTA-L1-031 到底是不是太胖了

题目描述：

题目思路：

题目代码：

#include <stdio.h>
#include <math.h>
int main()
{int n;scanf("%d", &n);for (int i = 0; i < n; i++){float h, w;scanf("%f %f", &h, &w);float stan = (h - 100) * 0.9 * 2;if (fabs(w - stan) < stan * 0.1)printf("You are wan mei!\\n");else if (stan < w)printf("You are tai pang le!\\n");elseprintf("You are tai shou le!\\n");}return 0;
}

题目来源：PTA-L1-063 吃鱼还是吃肉

题目描述：

题目思路：

题目代码：

#include <iostream>using namespace std;int main()
{int n;int sex,height,weight;cin>>n;for(int i=0;i<n;i++){cin>>sex>>height>>weight;if(sex==0){if(height<129){cout<<"duo chi yu! ";}else if(height==129){cout<<"wan mei! ";}else{cout<<"ni li hai! ";}//显示旁的if(weight<25){cout<<"duo chi rou!"<<endl;}else if(weight==25){cout<<"wan mei!"<<endl;}else{cout<<"shao chi rou!"<<endl;}}else{if(height<130){cout<<"duo chi yu! ";}else if(height==130){cout<<"wan mei! ";}else{cout<<"ni li hai! ";}//显示旁的if(weight<27){cout<<"duo chi rou!"<<endl;}else if(weight==27){cout<<"wan mei!"<<endl;}else{cout<<"shao chi rou!"<<endl;}}}return 0;
}

题目来源：PTA-L1-069 胎压监测

题目描述：

题目思路：

题目代码：

#include<bits/stdc++.h>
using namespace std;
#define inf 0x3f3f3f3f
#define N 10010
int n,m,k,g,d;
int x,y,z;
char ch;
string str;
vector<int>v[N];int main() {int a1,a2,a3,a4;cin>>a1>>a2>>a3>>a4>>g>>d;int maxx=0;maxx=max({a1,a2,a3,a4});int count=0;int flag1=0,flag2=0,flag3=0,flag4=0;if(a1<g||(maxx-a1)>d)count++;flag1=1;if(a2<g||(maxx-a2)>d)count++;flag2=1;if(a3<g||(maxx-a3)>d)count++;flag3=1;if(a4<g||(maxx-a4)>d)count++;flag4=1;if(count==0)cout<<"Normal"<<endl;else if(count==1){if(flag1==1){cout<<"Warning: please check #1!"<<endl;}else if(flag2==1){cout<<"Warning: please check #2!"<<endl;}else if(flag3==1){cout<<"Warning: please check #3!"<<endl;}else{cout<<"Warning: please check #4!"<<endl;}}else{cout<<"Warning: please check all the tires!"<<endl;}return 0;
}

题目来源：PTA-L1-077 大笨钟的心情

题目描述：

题目思路：

题目代码：

#include<bits/stdc++.h>
using namespace std;
#define inf 0x3f3f3f3f
#define N 10010
int n,m,k,g,d;
int x,y,z;
char ch;
string str;
vector<int>v[N];int main() {int num[24]={0};for(int i=0;i<24;i++){cin>>num[i];}for(int i=0; ;i++){cin>>x;if(x<0 || x>23)break;if(num[x]>50)cout<<num[x]<<" Yes"<<endl;else cout<<num[x]<<" No"<<endl;}return 0;
}

题目来源：PTA-L1-083 谁能进图书馆

题目描述：

题目思路：

题目代码：

#include<bits/stdc++.h>
using namespace std;
#define inf 0x3f3f3f3f
#define N 505
int n,m,k,g,d;
int x,y,z;
char ch;
string str;
vector<int>v[N];
#define PII pair<int,int>int main()
{int jin,pei,year1,year2;cin>>jin>>pei>>year1>>year2;if(year1<jin&&year2<pei){cout<<year1<<"-N ";}else{cout<<year1<<"-Y ";}if(year2<jin&&year1<pei){cout<<year2<<"-N";}else{cout<<year2<<"-Y";}cout<<endl;if(year1<jin&&year2>=jin&&year2<pei){cout<<2<<": huan ying ru guan"<<endl;}if(year2<jin&&year1>=jin&&year1<pei){cout<<1<<": huan ying ru guan"<<endl;}if(year1<jin&&year2<jin){cout<<"zhang da zai lai ba"<<endl;}if(year1>=jin&&year2>=jin){cout<<"huan ying ru guan"<<endl;}if(year1<jin&&year2>=pei){cout<<"qing "<<2<<" zhao gu hao "<<1<<endl;}if(year2<jin&&year1>=pei){cout<<"qing "<<1<<" zhao gu hao "<<2<<endl;}return 0;
}