C program to print any character in a square pattern

#include<stdio.h>
int main()
{
    int x = 0,y = 0;
    int ch = 0;
    unsigned int squareSide = 0;
    printf("Enter Side of a Square = ");
    scanf("%u",&squareSide);
    printf("\nEnter Character want to print in square pattern = ");
    fflush(stdin);
    ch = fgetc(stdin);
    //outer loop
    for(x = 0; x < squareSide; ++x)
    {
        //inner loop
        for(y = 0; y < squareSide; ++y)
        {
            fputc(ch,stdout);
        }
        printf("\n");
    }
    return 0;
}

Output: