S. Wave Form.cpp

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cmath>
#include <string>
#include <cstdlib>
#define DEBUGG freopen("f:\\in.txt", "rt", stdin);freopen("f:\\out.txt", "wt", stdout);
#define FOR(n) for(int i = 0; i < n; i++)
#define ll long long int
#define TESTCASE int t;scanf("%d", &t);for(int tc = 0; tc < t; tc++)
#define PF printf
#define SF scanf
#define EP 0.000000001
using namespace std;

int main()
{
    int n;
    TESTCASE
    {
        cin >> n;
        int temp = 1;

        if(n == 1) cout << '*' << endl;
        else
        {
            for(int i = n; i > 0; i--)
            {
                for(int j = 1; j < i; j++) cout << ' ';
                for(int j = 0; j < temp; j++) cout << '*';
                cout << endl;
                temp += 2;
            }
            temp -= 4;
            for(int i = 1; i < n; i++)
            {
                for(int j = 0; j < i; j++) cout << ' ';
                for(int j = 0; j < temp; j++) cout << '*';
                cout << endl;
                temp -= 2;
            }
        }
        if(tc != t-1)
            cout << endl;
    }


    return 0;
}