[C++知识库]C语言简单验证身份证号是否存在

C语言

bool ID_card()
{
	char crr[20];
	scanf_s("%s", &crr, 20);

	int arr[] = {7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2};
	int tmp = 0;
	for(int i=0; i<17; i++)
	{
		tmp += (crr[i]-'0') * arr[i];
	}

	int flg = tmp%11;

	char drr[] = {'1', '0', 'x', '9', '8', '7', '6', '5', '4', '3', '2'};

	return  crr[17] == drr[flg];
}

int main()
{
    printf("请输入需要验证的身份证号:");
	bool tag = ID_card();
	if(tag)
	{
		printf("身份证号码正确\n");
	}
	else
	{
		printf("身份证号码不正确\n");
	}
	return 0;
}

运行结果：