#include <iostream>
float cm;
float inch;
int valg;

float convert_to_inch()
{
    printf("Hvor mange cm vil du konvertere ti inches?");
    scanf_s("%f", &cm);
    inch = cm / 2.54;
    printf("%f cm tilsvarer %f inches", cm, inch);
    return 0;
}

float convert_to_metric()
{
    printf("Hvor mange inches vl du konvertere til cm?");
    scanf_s("%f", &inch);
    cm = inch*2.54;
    printf("%f inches tilsvarer %f cm", inch, cm);
    return 0;
}

int main()
{
    printf("Tast 1 for CM-INCHES\n Tast 2 INCHES-CM\n");
    scanf_s("%d", &valg);
    switch (valg)
    {
    case 1:
        convert_to_inch;
        system("Pause");
    case 2:
        convert_to_metric;
        system("pause");
    default:
        break;
    }
}