int main() {
int n = 0;
int a = 0;
int i = 0;
int sum = 0;
int tmp = 0;
printf("请输入a的值:>");
scanf("%d", &a);
printf("\n请输入n的值:>");
scanf("%d", &n);
tmp = a;
while (n--) {
sum = sum + tmp;
tmp = (tmp * 10) + a;
}
printf("%d",sum);
}
显示was not declared in this scope
错在哪里