Matriculas

#include <stdio.h>

#define TRUE 1

int _Val(int Num, int LimitInf, int LimitSup);
int _Toupper(char x);

int main()
{
    /// Declaracao e Iniciliazacao de variaveis.
    int Formato1, N1, N2, N3, N4, Formato2, count;
    int n1, n2, n3, n4, temp;
    char X1, X2, X3, X4, x2, x1;
    Formato1 = N1 = N2 = N3 = N4 = Formato2 = count = temp = x2 = n1 = n2 = x1 = 0;
    /////

    /// Input e Validacao da Matricula 1
    printf("Indique o Formato (M1): ");
    fflush(stdin);
    scanf("%d", &Formato1);

    // Escolha do tipo de Matricula
    printf("Introduza a Matricula (M1): ");
    fflush(stdin);
    switch(Formato1)
    {
    case 1: scanf("%c%c-%d-%d", &X1, &X2, &N1, &N2);;break;
    case 2: scanf("%d-%d-%c%c", &N1, &N2, &X1, &X2);break;
    case 3: scanf("%d-%c%c-%d", &N1, &X1, &X2, &N2);break;
    default: printf("\nErro\n"); return 0;
    }

    X1 = _Toupper(X1);
    X2 = _Toupper(X2);

    // Validacao
    if( !_Val(N1,0,99) || !_Val(N2,0,99) || !_Val(X1,'A','Z') || !_Val(X2,'A','Z') )
    {
        printf("\nErro\n");
        return 0;
    }
    /////

    /// Input e Validacao da Matricula 2
    printf("Indique o Formato (M2): ");
    fflush(stdin);
    scanf("%d", &Formato2);

    // Escolha da Matricula 2
    printf("Introduza a Matricula (M2): ");
    fflush(stdin);
    switch(Formato2)
    {
    case 1: scanf("%c%c-%d-%d", &X3, &X4, &N3, &N4);;break;
    case 2: scanf("%d-%d-%c%c", &N3, &N4, &X3, &X4);break;
    case 3: scanf("%d-%c%c-%d", &N3, &X3, &X4, &N4);break;
    default: printf("\nErro\n"); return 0;
    }

    X3 = _Toupper(X3);
    X4 = _Toupper(X4);

    // Validacao da Matricula 2
    if( !_Val(N3,0,99) || !_Val(N4,0,99) || !_Val(X3,'A','Z') || !_Val(X4,'A','Z') )
    {
        printf("\nErro\n");
        return 0;
    }
    /////

    for(x1 = X1; x1 <= X3 ; x1++)
    {
        for(x2 = 'A'; x2 < 'Z'+1 ; x2++)
        {
            if( temp == 0 )
                    x2 == X2;
            for(n1 = 0; n1 <= 99 ; n1++)
            {
                if( temp == 0 )
                    n1 == N1;
                for(n2 = 0; n2 <= 99 ; n2++)
                {
                    if( temp == 0 )
                    {
                        temp++;
                        n2 = N2;
                    }
                    if( n2 == N4 && n1 == N3 )
                        break;
                }
                count += n2;
                if( n2 == N4 && n1 == N3 && x2 == X4)
                    break;
            }
            if( n2 == N4 && n1 == N3 && x2 == X4 && x1 == X3)
                    break;
        }
    }

    printf("\n %d \n", count);


    return 0;
}

int _Val(int Num, int LimitInf, int LimitSup)
{
    return (Num >= LimitInf && Num <= LimitSup) ? 1 : 0;
}

int _Toupper(char x)
{
    return (x >= 'a' && x <= 'z') ? x+32 : x;
}