declare function to allow user have second chance enter choice

[kkkcj]

i', develop a math program now , how can i allow my user to have second chance when they enter wrongly?

void additionmenu()
{
    char choice;
    printf("Please select the level\n");
    printf("A level 1\n");
    printf("B level 2\n");
    printf("C level 3\n");
    scanf("%c", &choice);
    if (choice == 'A' || choice == 'a')
    {
        printf("You have selected level 1\n");
        addEasy();
    }
    else if (choice == 'B' || choice == 'b')
    {
        printf("You have selected level 2\n");
        addMedium();
    }
    else if (choice == 'C' || choice == 'c')
    {
        printf("You have selected level 3\n");
        addDifficult();
    }
    else
    {
        printf("Invalid choice\n");
        menu();
    }
    rewind(stdin);
    return choice;
}

[GReaper]

Adding all this inside a loop would be a good solution, maybe with a counter to count how many times the user tried to input something, and maybe aborting after N tries.

[Hodor]

You are using rewind() on stdin? Is that sensible?

[kkkcj]

can u show me a example?

[kkkcj]

can u help me look at my another code?

[Dmy]

#include <iostream>



int main()
{
    bool b=1;
    while(b)
        {
            std::cout<< "Введіть 1 для продовження або 0 для виходу"<< std::endl;
            std::cin>> b;

        }
   return 0;
}

I may have not understood what you wanted?