C / C++ / MFC

Ibrahim Bello wrote:

In your function prototypes, you don't need to specify any variable names for the parameters. Just the data types are OK. This is Ok:
void DrillOneProb (int, int, int);

void Gen2Rand (int*, int*);

#define SENT 4 //"Quit" menu choice
  
/*  Display Title and Menu */
void DisplayMenu (void)
{
    printf("MENU OF OPERATIONS\n");
    printf("1. Addition.\n");
    printf("2. Subtraction.\n");
    printf("3. Multiplication.\n");
    printf("4. Quit.\n\n");
}
  
/* Get Menu Choice */
int GetMenuChoice (void)
{
    int c;
      
    do
    {
        printf ("Enter the number of the operation to try (1-4):\n");
        scanf ("%d", &c);
        if  (c<1 || c>SENT)
            printf("\aInput value is out of range.\n");
    } while (c < 1 || c > SENT);
  
    return (c);
}
  
/* Generate and return 2 integers between 2-12 inclusive */
void Gen2Rand (int*r1p, int*r2p)
{
    int r1; //First random number
    int r2; //Second random number
  
    r1 = 2 + rand() % 11;
    r2 = 2 + rand() % 11;
  
    *r1p = r1;
    *r2p = r2;
}
  
/* Display two random numbers and ask user what the answer would be after the chosen operation*/
void DrillOneProb (int c, int r1, int r2)
{
    int CorAns, //Correct Answer
        Reply;  // Users Reply
  
    switch (c)
    {
        case 1:
            printf("+");
            CorAns = r1 + r2;
            break;
  
        case 2:
            printf("-");
            CorAns = r1 - r2;
            break;
  
        default:
            printf("x");
            CorAns = r1 * r2;
            break;
    }
  
    printf(" %d, ?", Reply);
    scanf ("%d", &Reply);
    if (Reply == CorAns)
        printf("Yes, that is correct. Good Job!");
    else
    {
        printf("No, the correct answer is: %d", CorAns);
        printf("\n\n");
    }
}
  
int main (void)
{
    int   c;   //Menu Choice (1-4)
    int   r1,  //First Random Integer:  2-12 inclusive
          r2;  //Second Randon Integer:  2-12 inclusive
  
    DisplayMenu();
    c = GetMenuChoice();
    while (c >= 1 && c < SENT)
    {
        Gen2Rand (&r1, &r2);
        DrillOneProb (c, r1,r2);
        DisplayMenu();
        c = GetMenuChoice();
        printf("Program Complete\n");
    }
  
    return (0);
}

if(!file.fail())
{
 //...
}

g_ptrMaterials = new Material [g_numberOfRows];
Material mat;
mat.temperature = 200.00; // for example

vector<Material> vctr;
Material mat;
mat.temperature = 200.00; // for example
mat.density = bla bla; 

vctr.push_back(mat);

MATERIAL* arrMaterial = new MATERIAL[g_numberOfRows];
g_ptrMaterial = &arrMaterial[0];

arrMaterial[i] = new Material; //everything works fine now

Jan Sommer wrote:

...how would you do that?