Cálculos para Resistores

O iniciante em eletrônica esta sempre em busca de programas para ajudá-lo em cálculos de resistores.
Este programa tem uma interface agradável com menus inteligentes e poderá ajuda-lo
nos seus cálculos de resistência. O código foi compilado no MinGw mais os programadores experientes
poderá compilá-lo em qualquer compilador e ainda fazer alterações para torná-lo mais adequado as suas necessidades.

Veja o Código abaixo:

#include <stdio.h>

#include <conio2.h>

#include <time.h>

int r1, r2, r3, rt;

void Janela6 ( ) {

     int lin, col;

     col = 0;

     for ( lin = 2; lin <= 24; lin++ )

         for ( col = 3; col <= 78; col++ ) {

              gotoxy ( col, lin );

              textbackground ( 6 );

              printf ( " " );

         }

     col = 0;

     for ( lin = 5; lin <= 21; lin++ )

         for ( col = 6; col <= 75; col++ ) {

              gotoxy ( col, lin );

              textbackground ( 16 );

              printf ( " " );

         }

}

void Janela5 ( ) {

     int lin, col;

     col = 0;

     for ( lin = 2; lin <= 24; lin++ )

         for ( col = 2; col <= 78; col++ ) {

              gotoxy ( col, lin );

              textbackground ( WHITE );

              printf ( " " );

         }

}

void Funcdefault ( ) {

     void janela5 ( );

     int opc;

     switch ( opc ) {

         default:

              Janela5 ( );

              gotoxy ( 32, 12 );

              printf ( "\aOP€ÇO INVµLIDA!\n" );

              Sleep ( 1800 );

              gotoxy ( 3, 24 );

              break;

     }

}

void Funcexit ( ) {

     time_t hora_atual;

     void Janela5 ( );

     Janela5 ( );

     gotoxy ( 32, 11 );

     textcolor ( BLACK );

     printf ( "OPERA€ÇO FINALIZADA" );

     Sleep ( 1800 );

     gotoxy ( 20, 13 );

     printf ( "MUITO OBRIGADO POR TER USADO ESTE PROGRAMA\n" );

     time ( &hora_atual );

     gotoxy ( 20, 15 );

     printf ( "A data e hora atuais sÆo: %s", ctime ( &hora_atual ) );

     Sleep ( 1800 );

     exit ( 0 );

     gotoxy ( 2, 27 );

}

void menu2 ( void ) {

     system ( "cls" );

     void Janela5 ( );

     int main ( void );

     int op;

     do {

         Janela6 ( );

         textcolor ( LIGHTRED );

         gotoxy ( 29, 3 );

         printf ( "CµLCULOS PARA RESISTORES" );

         textcolor ( LIGHTGREEN );

         gotoxy ( 31, 8 );

         printf ( "ESCOLHA UMA OP€ÇO ABAIXO" );

         textcolor ( LIGHTBLUE );

         gotoxy ( 19, 10 );

         printf ( "1 - ASSOCIANDO TRES RESISTORES EM PARALELO\n" );

         gotoxy ( 19, 12 );

         printf ( "2 - SAIR" );

         gotoxy ( 19, 14 );

         printf ( "3 - VOLTA AO MENU PRINCIPAL" );

         gotoxy ( 19, 16 );

         textcolor ( YELLOW );

         scanf ( "%d", &op );

         fflush ( stdin );

         system ( "cls" );

         switch ( op ) {

              case 1:

                   Janela6 ( );

                   textcolor ( LIGHTRED );

                   gotoxy ( 29, 3 );

                   printf ( "CµLCULOS PARA RESISTORES" );

                   textcolor ( LIGHTBLUE );

                   gotoxy ( 26, 8 );

                   printf ( "ASSOCIANDO TRES RESISTORES EM PARALELO\n" );

                   textcolor ( YELLOW );

                   gotoxy ( 29, 10 );

                   printf ( "Digite um valor pra R1" );

                   textcolor ( LIGHTRED );

                   gotoxy ( 29, 11 );

                   printf ( "R1 = " );

                   scanf ( "%d", &r1 );

                   fflush ( stdin );

                   textcolor ( YELLOW );

                   gotoxy ( 29, 13 );

                   printf ( "Digite um valor pra R2" );

                   textcolor ( LIGHTRED );

                   gotoxy ( 29, 14 );

                   printf ( "R2 = " );

                   scanf ( "%d", &r2 );

                   fflush ( stdin );

                   textcolor ( YELLOW );

                   gotoxy ( 29, 16 );

                   printf ( "Digite um valor pra R3" );

                   textcolor ( LIGHTRED );

                   gotoxy ( 29, 17 );

                   printf ( "R3 = " );

                   scanf ( "%d", &r3 );

                   fflush ( stdin );

                   rt = ( r1 * r2 * r3 ) / ( r2 * r3 + r1 * r2 + r1 * r3 );

                   textcolor ( LIGHTGREEN );

                   gotoxy ( 29, 19 );

                   printf ( "RT = %d ", rt );

                   Sleep ( 1800 );

                   system ( "cls" );

                   break;

              case 2:

                   Funcexit ( );

                   break;

              case 3:

                   main ( );

                   break;

              default:

                   Funcdefault ( );

                   break;

         }

     } while ( op != 0 );

}

void menu1 ( void ) {

     system ( "cls" );

     void Janela6 ( );

     int main ( void );

     int op;

     do {

         Janela6 ( );

         textbackground ( BLACK );

         textcolor ( LIGHTRED );

         gotoxy ( 29, 3 );

         printf ( "CµLCULOS PARA RESISTORES" );

         textcolor ( LIGHTGREEN );

         gotoxy ( 31, 8 );

         printf ( "ESCOLHA UMA OP€ÇO ABAIXO" );

         textcolor ( LIGHTBLUE );

         gotoxy ( 19, 10 );

         printf ( "1 - ASSOCIANDO DOIS RESISTORES EM PARALELO\n" );

         gotoxy ( 19, 12 );

         printf ( "2 - SAIR" );

         gotoxy ( 19, 14 );

         printf ( "3 - VOLTA AO MENU PRINCIPAL" );

         gotoxy ( 19, 16 );

         textcolor ( YELLOW );

         scanf ( "%d", &op );

         fflush ( stdin );

         system ( "cls" );

         switch ( op ) {

              case 1:

                   Janela6 ( );

                   textcolor ( LIGHTRED );

                   gotoxy ( 29, 3 );

                   printf ( "CµLCULOS PARA RESISTORES" );

                   textcolor ( LIGHTBLUE );

                   gotoxy ( 23, 8 );

                   printf ( "ASSOCIANDO DOIS RESISTORES EM PARALELO" );

                   textcolor ( YELLOW );

                   gotoxy ( 29, 10 );

                   printf ( "Digite um valor pra R1" );

                   gotoxy ( 29, 12 );

                   textcolor ( LIGHTRED );

                   printf ( "R1 = " );

                   scanf ( "%d", &r1 );

                   fflush ( stdin );

                   textcolor ( YELLOW );

                   gotoxy ( 29, 14 );

                   printf ( "Digite um valor pra R2" );

                   gotoxy ( 29, 16 );

                   textcolor ( LIGHTRED );

                   printf ( "R2 = " );

                   scanf ( "%d", &r2 );

                   fflush ( stdin );

                   rt = ( r1 * r2 ) / ( r1 + r2 );

                   textcolor ( LIGHTGREEN );

                   gotoxy ( 29, 18 );

                   printf ( "RT = %d ", rt );

                   Sleep ( 1800 );

                   system ( "cls" );

                   break;

              case 2:

                   Funcexit ( );

                   break;

              case 3:

                   main ( );

                   break;

              default:

                   Funcdefault ( );

                   break;

              case 10:

                   Funcexit ( );

                   break;

         }

     } while ( op != 0 );

}

int main ( void ) {

     system ( "title CÁLCULOS PARA RESISTORES" );

     void Funcexit ( );

     int op;

     do {

         Janela6 ( );

         textcolor ( LIGHTRED );

         gotoxy ( 29, 3 );

         printf ( "CµLCULOS PARA RESISTORES" );

         textcolor ( LIGHTBLUE );

         gotoxy ( 35, 8 );

         printf ( "MENU PRINCIPAL" );

         textcolor ( LIGHTGREEN );

         gotoxy ( 31, 10 );

         printf ( "ESCOLHA UMA OP€ÇO ABAIXO" );

         textcolor ( WHITE );

         gotoxy ( 19, 12 );

         printf ( "1 - ASSOCIANDO DOIS RESISTORES EM PARALELO\n" );

         gotoxy ( 19, 13 );

         printf ( "2 - ASSOCIANDO TRES RESISTORES EM PARALELO\n" );

         gotoxy ( 19, 14 );

         printf ( "3 - SAIR" );

         gotoxy ( 19, 16 );

         textcolor ( YELLOW );

         scanf ( "%d", &op );

         fflush ( stdin );

         system ( "cls" );

         switch ( op ) {

              case 1:

                   menu1 ( );

                   break;

              case 2:

                   menu2 ( );

                   break;

              case 3:

                   Funcexit ( );

                   break;

              default:

                   Funcdefault ( );

                   break;

         }

     } while ( op != 0 );

     Funcexit ( );

     return 0;

}