C語言：打印所有char字符

#include <stdio.h>
int main()
{

    int aa;
    char bla;
    for(aa=0;aa<=255;aa++)
    {
        if(aa%10==0 and aa!=0)
            {printf("\n");}
        else
        {
        bla=char(aa);
        printf("%c",bla);}
    }
    getchar();
}