Printing out characters in an X pattern using for loops

Question

I\'m trying to print this big X pattern:

 x       x
  x     x
   x   x
    x x
     x
    x x
   x   x
  x     x
 x       x

I can\'t figure out

Answer 1

#include 

int main(){
    int n = 5 - 1;
    char ch[] = "x";
    int i = 0, dx = 1;

    do{
        printf("%*s%*.*s\n", i+1, ch, 2*(n-i),2*(n-i), ch);
        if((i += dx)==n)
            dx = -dx;
    }while(i>=0);
    return 0;
}

---

for(;;){
    printf("%*s%*.*s\n", i+1, ch, 2*(n-i),2*(n-i), ch);
    if((i += dx)==n)
        dx = -dx;
    else if(i < 0)
        break;
}

---

int n = 5 - 1;
char ch[] = "x";
int i = 0;

for(; i < n ; ++i){
    printf("%*s%*.*s\n", i+1, ch, 2*(n-i),2*(n-i), ch);
}
for(; i >=0 ; --i){
    printf("%*s%*.*s\n", i+1, ch, 2*(n-i),2*(n-i), ch);
}