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发表于 2023-12-4 20:24:46
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#include<iostream>
using namespace std;
int main(){
char a;
cin >> a;
cout << " " << a << " " << endl;
cout << " " << a << a << a << " " << endl;
cout << a << a << a << a << a << endl;
cout << " " << a << a << a << " " << endl;
cout << " " << a << " ";
return 0;
}
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