题解与来源题共享。已有题解默认通过；新增或编辑后需由来源域管理员审核。待审核、驳回题解仅作者和审核管理员可见。来源域：YuFa

• 1

  yanyixi LV 8 @ 2026-8-31 15:17:02

  #include<bits/stdc++.h>
  using namespace std;
  void work(int n){
  	for(int i=1;i<=n;i++){
  		cout<<"cout<< \"";
  		for(int j=1;j<=i;j++){
  			cout<<"*";
  		}
  		cout<<"\"<<endl;";
  		cout<<endl;;
  	}
  }
  int main(){
  	for(int i=1;i<=20;i++){
  		cout<<"if("<<"n=="<<i<<"){\n";
  		work(i);
  		cout<<"\n";
  		cout<<"}\n";
  	}
  	return 0;
  }
  

  $~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\downarrow$

  #include<bits/stdc++.h>
  using namespace std;
  int main(){
  int n;
  cin>>n;
  if(n==1){
  cout<< "*"<<endl;;
  
  }
  if(n==2){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  
  }
  if(n==3){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  
  }
  if(n==4){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  
  }
  if(n==5){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  
  }
  if(n==6){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  
  }
  if(n==7){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  
  }
  if(n==8){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  
  }
  if(n==9){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  
  }
  if(n==10){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  
  }
  if(n==11){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  
  }
  if(n==12){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  cout<< "************"<<endl;
  
  }
  if(n==13){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  cout<< "************"<<endl;
  cout<< "*************"<<endl;
  
  }
  if(n==14){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  cout<< "************"<<endl;
  cout<< "*************"<<endl;
  cout<< "**************"<<endl;
  
  }
  if(n==15){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  cout<< "************"<<endl;
  cout<< "*************"<<endl;
  cout<< "**************"<<endl;
  cout<< "***************"<<endl;
  
  }
  if(n==16){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  cout<< "************"<<endl;
  cout<< "*************"<<endl;
  cout<< "**************"<<endl;
  cout<< "***************"<<endl;
  cout<< "****************"<<endl;
  
  }
  if(n==17){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  cout<< "************"<<endl;
  cout<< "*************"<<endl;
  cout<< "**************"<<endl;
  cout<< "***************"<<endl;
  cout<< "****************"<<endl;
  cout<< "*****************"<<endl;
  
  }
  if(n==18){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  cout<< "************"<<endl;
  cout<< "*************"<<endl;
  cout<< "**************"<<endl;
  cout<< "***************"<<endl;
  cout<< "****************"<<endl;
  cout<< "*****************"<<endl;
  cout<< "******************"<<endl;
  
  }
  if(n==19){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  cout<< "************"<<endl;
  cout<< "*************"<<endl;
  cout<< "**************"<<endl;
  cout<< "***************"<<endl;
  cout<< "****************"<<endl;
  cout<< "*****************"<<endl;
  cout<< "******************"<<endl;
  cout<< "*******************"<<endl;
  
  }
  if(n==20){
  cout<< "*"<<endl;
  cout<< "**"<<endl;
  cout<< "***"<<endl;
  cout<< "****"<<endl;
  cout<< "*****"<<endl;
  cout<< "******"<<endl;
  cout<< "*******"<<endl;
  cout<< "********"<<endl;
  cout<< "*********"<<endl;
  cout<< "**********"<<endl;
  cout<< "***********"<<endl;
  cout<< "************"<<endl;
  cout<< "*************"<<endl;
  cout<< "**************"<<endl;
  cout<< "***************"<<endl;
  cout<< "****************"<<endl;
  cout<< "*****************"<<endl;
  cout<< "******************"<<endl;
  cout<< "*******************"<<endl;
  cout<< "********************"<<endl;
  
  }	
  	return 0;
  }
  
  

• 1