Hello fellow programmers of wibit.net (this is my first post)! I have been in the programming business for about 3 months now I am perfectionizing my skills in C programming, and I decided to make a program (for no professional purpose, just practice) that would serve as a virtual calculator. Sadly, it isn't working properly, Please help!

The program prompts the user what kind of mathematical function you would like it to perform and then it prompts you to enter the numbers you would like to perform the function on. It has an extra feature as well, that allows you to save the result of the answer in one of ten memory slots, and it also allows you to load one of these values as well, and also to exit.

Incredibly, I managed to compile it (by suppressing all warnings)! However, it allways crashes at the same part, here is the code:

#include stdio.h
#include stdlib.h
#include string.h
#include math.h

char* Add = "Add";
char* Sub = "Subtract";
char* Mul = "Multiply";
char* Div = "Divide";
char* Sqt = "Square Root";
char* Squ = "Square";
char* Sav = "Save Value";
char* Lod = "Load Value";
char* Exi = "Exit";

char* A = "FileA";
char* B = "FileB";
char* C = "FileC";
char* D = "FileD";
char* E = "FileE";
char* F = "FileF";
char* G = "FileG";
char* H = "FileH";
char* I = "FileI";
char* j = "FileJ";

int FileA;
int FileB;
int FileC;
int FileD;
int FileE;
int FileF;
int FileG;
int FileH;
int FileI;
int FileJ;

int SubtractNumbers (int, int);
int AddNumbers (int,int);
int DivideNumbers (int, int);
int MultiplyNumbers (int, int);
int SqurootOfNumber (int);
int RaiseNumToPow (int);
void SaveNumber (int);
void LoadNumber (char [255]);

int main()
{
  int Num1;
  int Num2;
  char FunctionChoice [255];
  char FileChoice [255];

  printf ("Welcome to iMath, the virtual calculator\n");

  START:

  printf ("Enter the mathmatical function you would like to perform\n");
  printf ("%s, %s, %s, %s, %s, %s, %s, %s or %s: ", Add, Sub, Mul, Div, Squ, Sqt, Sav, Lod, Exi);
  scanf ("%s", FunctionChoice);
  if (strcmp (FunctionChoice, Exi) == 0)
  {
    goto EXIT;
  }
  printf ("\nNow enter number(s) you would like to include in the function %s: ", FunctionChoice);
  scanf ("%d", &Num1 );
  if (strcmp (FunctionChoice, Add || Sub || Div || Mul) == 0)
  {
    scanf ("%d", &Num2);
  }
 
  EXIT:

  \\This is the part where it screws up during execution

  if (strcmp (FunctionChoice, Add) == 0)
  {
    printf ("\n%d plus %d is %d", Num1, Num2, AddNumbers (Num1, Num2));
    goto START;
  }
  else if (strcmp (FunctionChoice, Sub) == 0)
  {
    printf ("\n%d minus %d is equal to %d", Num1, Num2, SubtractNumbers (Num1, Num2));
    goto START;
  }
  else if (strcmp (FunctionChoice, Mul) == 0)
  {
    printf ("\n%d multiplied by %d is equal to %d", Num1, Num2, MultiplyNumbers (Num1, Num2));
    goto START;
  }
  else if (strcmp (FunctionChoice, Div) == 0)
  {
    printf ("\n%d divided by %d is equal to %d", Num1, Num2, DivideNumbers (Num1, Num2));
    goto START;
  }
  else if (strcmp (FunctionChoice, Sqt) == 0)
  {
    printf ("\nThe square root of %d is equal to %d", Num1, SqurootOfNumber (Num1));
    goto START;
  }
  else if (strcmp (FunctionChoice, Squ) == 0)
  {
    printf ("\nThe %d squared is equal to %d", Num1, RaiseNumToPow (Num1));
    goto START;
  }
  else if (strcmp (FunctionChoice, Sav) == 0)
  {
    SaveNumber (Num1);
    goto START;
  }
  else if (strcmp (FunctionChoice, Lod) == 0)
  {
    LoadNumber (FileChoice);
    goto START;
  }
  else if (strcmp (FunctionChoice, Exi) == 0)
  {
    printf ("\nThank you for using iMath");
  }
  else
  {
    printf ("\n%s is an Unknown function", FunctionChoice);
    goto START;
  }
  return 0;
}

int SubtractNumbers (int i, int j)
{
  return i - j;
}

int AddNumbers (int i, int j)
{
  return i + j;
}

int DivideNumbers (int i, int j)
{
  return i / j;
}

int MultiplyNumbers (int i, int j)
{
  return i * j;
}

int SqurootOfNumber (int i)
{
  return sqrt (i);
}

int RaiseNumToPow (int i)
{
  return i * i;
}

void SaveNumber (int x)
{
  char FileChoice [255];

  printf ("\nEnter which file you would like to save your data in: ");
  scanf ("%s", FileChoice);
  
  if (strcmp (FileChoice, A) == 0)
  {
    FileA = x;
  }
  else if (strcmp (FileChoice, B) == 0)
  {
    FileB = x;
  }
  else if (strcmp (FileChoice, C) == 0)
  {
    FileC = x;
  }
  else if (strcmp (FileChoice, D) == 0)
  {
    FileD = x;
  }
  else if (strcmp (FileChoice, E) == 0)
  {
    FileE = x;
  }
  else if (strcmp (FileChoice, F) == 0)
  {
    FileF = x;
  }
  else if (strcmp (FileChoice, G) == 0)
  {
    FileG = x;
  }
  else if (strcmp (FileChoice, H) == 0)
  {
    FileH = x;
  }
  else if (strcmp (FileChoice, I) == 0)
  {
    FileI = x;
  }
  else
  {
    FileJ = x;
  }
}

void LoadNumber (char FileChoice [255])
{
  printf ("\nEnter which file you would like to load data from: ");
  scanf ("%s", FileChoice);

  if (strcmp (FileChoice, A) == 0)
  {
    printf ("\n%d", FileA);
  }
  else if (strcmp (FileChoice, B) == 0)
  {
    printf ("\n%d", FileB);
  }
  else if (strcmp (FileChoice, C) == 0)
  {
    printf ("\n%d", FileC);
  }
  else if (strcmp (FileChoice, D) == 0)
  {
    printf ("\n%d", FileD);
  }
  else if (strcmp (FileChoice, E) == 0)
  {
    printf ("\n%d", FileE);
  }
  else if (strcmp (FileChoice, F) == 0)
  {
    printf ("\n%d", FileF);
  }
  else if (strcmp (FileChoice, G) == 0)
  {
    printf ("\n%d", FileG);
  }
  else if (strcmp (FileChoice, H) == 0)
  {
    printf ("\n%d", FileH);
  }
  else if (strcmp (FileChoice, I) == 0)
  {
    printf ("\n%d", FileI);
  }
  else
  {
    printf ("\n%d", FileJ);
  }
  
}

Many thanks in advance to the one that can solve this problem (sorry for the long post...)!