Answer:
#include<iostream>
using namespace std;
int main()
{
int i,j,k,n,ch;
do{
cout<<"\nMenu";
cout<<"\n1. Square pattern";
cout<<"\n2. Triangle pattern";
cout<<"\n3. Diaginal pattern";
cout<<"\n4. Reverse diaginal pattern";
cout<<"\n5. Quit";
cin>>ch;
switch(ch)
{
case 1: a1:
cout<<"\nEnter Size:";
cin>>n;
if(n>=1 && n<=9)
{
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
{ cout<<n; }
cout<<"\n";
}
}
else
{
cout<<"\nYour Size is Out of range!!";
goto a1;}
break;
case 2:a2:
cout<<"\nEnter Size:";
cin>>n;
if(n>=1 && n<=9)
{
for(i=0;i<n;i++)
{
for(j=0;j<=i;j++)
{ cout<<n; }
}
}
else
{
cout<<"\nYour Size is Out of range!!";
goto a2;}
break;
case 3:a3:
cout<<"\nEnter Size:";
cin>>n;
if(n>=1 && n<=9)
{
for(i=0;i<n;i++)
{
for(j=0;j<i;j++)
{
cout<<"*";
}
cout<<n;
for(j=i+1;j<n;j++)
{
cout<<"*";
}
cout<<"\n";
}
}
else
{
cout<<"\nYour Size is Out of range!!";
goto a3;}
break;
case 4:a4:
cout<<"\nEnter Size:";
cin>>n;
if(n>=1 && n<=9)
{
for(i=0;i<n;i++)
{
for(j=1;j<n-i;j++)
{
cout<<"*";
}
cout<<n;
for(j=0;j<i;j++)
{
cout<<"*";
}
cout<<"\n";
}
}
else
{
cout<<"\nYour Size is Out of range!!";
goto a4;}
break;
case 5:
return 0;
break;
default: return 0;
}
}while(ch>0 && ch< 5);
return 0;
}
Explanation:
