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20 lines
539 B

2 years ago
#include <bits/stdc++.h>
using namespace std;
int main() {
//如果要求输入的是9行那么n=(9+1)/2=5
int i, j, n = 5;
for (i = 1; i <= n; i++) {
for (j = 1; j <= (n - i); j++) cout << " ";
for (j = 1; j <= (2 * (i - 1) + 1); j++) cout << "*";
cout << endl;
}
for (i = n - 1; i >= 1; i--) {
for (j = 1; j <= (n - i); j++) cout << " ";
for (j = 1; j <= (2 * (i - 1) + 1); j++) cout << "*";
cout << endl;
}
cout << endl;
return 0;
}