在调试下面的代码时出现访问冲突的问题

用软件**VS2017**编写了下面C语言的代码，调试时出现访问冲突的问题

#include
#include

int main()
{
double number1 = 0.0;
double number2 = 0.0;
char operation=0;

printf("\nEnter the caculation\n");
scanf_s("%lf %c %lf", &number1, &operation, &number2);

switch (operation)
{
case '+':
    printf("= %lf\n", number1 + number2);
    break;

case'-':
    printf("= %lf\n", number1 - number2);
    break;

case'*':
    printf("= %lf\n", number1*number2);
    break;

case'/':
    if (number2 == 0)
        printf("\n\n\aDivision by zero error!\n");
    else
        printf("= %lf\n", number1 / number2);
    break;

case'%':
    if ((long)number2 == 0)
        printf("\n\n\aDivision by zero error!\n");
    else
        printf("= %ld\n", (long)number1 % (long)number2);
    break;

default:
    printf("\n\n\aIllegal operation!\n");
    break;
}
system("pause");
return 0;

}

想知道具体该怎么解决