Preview:
#include<stdio.h>
int main(){
    // Author : Khadiza Sultana
    int n = 4;
    for(int i = 0; i < n; i++){
        for(int j = 0; j < (i + 1); j++)
        printf("* ");
        for(int j = 0; j < 2 * (n - i - 1); j++)
        printf("  ");
        for(int j = 0; j < (i + 1); j++)
        printf("* ");
        printf("\n");
    }
    for(int i = 0; i < n; i++){
        for(int j = n; j > i; j--)
        printf("* ");
        for(int j = 0; j < 2 * i; j++)
        printf("  ");
        for(int j = n; j > i; j--)
        printf("* ");
        printf("\n");
    }
    return 0;
}
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