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#include <iostream>
using namespace std;
int main() {
int n ;
do{
cout<<"Enter an odd integer between 10 and 20: ";
cin>>n;
}while((n>20)&&(n<10));
char a[n][n];
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
if((i==0)||(j==0)||(i==(n-1))||(j==(n-1)))a[i][j]='X';
else if(i==j)
{
a[i][j]='X';
}
else if ((i+j)==(n-1))
{
a[i][j]='X';
}
else
{
a[i][j]='-';
}
}
}
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
cout<<a[i][j]<<" ";
}
cout<<endl;
}
return 0;
}
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