输出菱形作业

#include <cstdio>
int main(void) {
    for(int i = 1;i<=4;i++){
        for(int j = 1;j<=4-i;j++){
            printf(" ");
        }
        for(int k = 1;k<=2*i-1;k++){
            printf("*");
        }
        printf("\n");
    }
    // 5 3 1
    for(int i = 1;i<=3;i++){
        for(int j = 1;j<=i;j++){
            printf(" ");
        }
        for(int k = 1;k<=7-2*i;k++){
            printf("*");
        }
        printf("\n");
    }
}

#include <iostream>
#include <math.h>
using namespace std;
int main(void) {
    int n;
    cin >> n;
    int cx = n/2;
    int cy = n/2;
    for (int i = 0; i < n; i++)
    {
        for (int j = 0; j < n; j++)
        {
            if(abs(i - cx) + abs(j-cy) <= n/2){
                cout << "*";
            }
            else {
                cout << " ";
            }
        }
        cout << endl;
        
    }
    
}