C++题解

AC代码

#include <iostream>
using namespace std;

int main() {
	int n, m, b;
	char c;
	cin >> n >> m >> c >> b;
	if (b == 1) {
		for (int i = 1; i <= n; ++i) {
			for (int j = 1; j <= m; ++j) {
				cout << c;
			}
			cout << endl;
		}
	} else {
		for (int i = 1; i <= m; ++i) {
			cout << c;
		}
		cout << endl;
		for (int i = 1; i <= n - 2; ++i) {
			cout << c;
			for (int j = 1; j <= m - 2; ++j) {
				cout << ' ';
			}
			cout << c << endl;
		}
		for (int i = 1; i <= m; ++i) {
			cout << c;
		}
	}
	return 0;
}