把字符串变量强制转换成字符串数组

例如unsigned char val =“abnjk”；
unsigned char aval[10]；
怎么把val 给aval 使aval[]变成“abnjk”

char *p = val;
int i = 0;
while(*p && i < 10) {
aval[i] = *p++;
i++;
}