I can not fix the error, and not back to the main menu and or alter someone help me fix the code please?

[sassazinho]

  I can not correct the error, and not back to the main menu, or change someone help me fix the code, please, I'm doing a barbershop system and I can not change, delete, add, search in Notepad someone help me please?
#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<string.h>
struct documento {
typedef struct {
char nada[10];
char nome[40];
char cpf[14];
char rg[12];
char telefone[20];
char ende[30];
char sexo[15];
char nacionalidade[15];
char hora_entrada[10];
char hora_saida[10];
void voltar (){
int opc;
printf("Deseja voltar ao menu 1-SIM \n");
scanf("%d", &opc);
switch (opc){

}
}

//====================================================== FIM ==================================================

//====================================================== FUNÇÃO QUEBRA LINHA ==================================
void quebra_linha(){
printf("\n\n");
}
}trabalho;
FILE *trab;
int menu(){
int num;

printf("\t\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB\xDB SISTEMA BARBEARIA v.1.0 \xDB Beta \xDB\t\n");
printf("\t\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB --> ESCOLHA UMA DAS OPCOES ABAIXO <-- \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB ------------------------------------------------------- \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB 1 - Cliente || 0 - Sair \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB ------------------------------------------------------- \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\t\n");
printf("C.R.F - Escolha Uma Opcao ->"); 

scanf("%d",&num);
system("cls");
return num;
}
trabalho cliente(){
int num1;
trabalho t;

printf("\t\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB\xDB OPCOES de Cliente v.1.0 \xDB Beta \xDB\t\n");
printf("\t\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB --> ESCOLHA UMA DAS OPCOES ABAIXO <-- \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB ------------------------------------------------------- \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB 1 - NOVO | 2 - ALTERAR | 3 - EXCLUIR | 4 - IMPRIMIR \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB ------------------------------------------------------- \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB 5 - VOLTAR \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB ------------------------------------------------------- \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB ------------------------------------------------------- \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB DIGITE UMA OPCAO \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB ------------------------------------------------------- \xDB\xDB\xDB\t\n");
printf("\t\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\xDB\t\n");

scanf("%d",&num1);
if(num1==1){
trab=fopen("Cad_Cliente.txt", "a");
fgets(t.nada,10,stdin);
printf("INFORME SEU NOME: \n");
fgets(t.nome,40,stdin);
printf("INFORME SEU CPF: \n");
fgets(t.cpf,14,stdin);
printf("INFORME SEU RG: \n");
fgets(t.rg,12,stdin);
printf("INFORME SEU TELEFONE: \n");
fgets(t.telefone,20,stdin);
printf("INFORME SEU ENDERECO: \n");
fgets(t.ende,30,stdin);
printf("INFORME SEU SEXO: \n");
fgets(t.sexo, 15, stdin);
printf("INFORME SUA NACIONALIDADE: \n");
fgets(t.nacionalidade, 15, stdin);
printf("INFORME SUA HORA DE CHEGADA: \n");
fgets(t.hora_entrada, 10, stdin);
printf("INFORME SUA HORA DE SAIDA: \n");
fgets(t.hora_saida, 10, stdin);
printf("\nCadastro efetuado com sucesso!! \n");
int opc;{
printf("\nDeseja voltar ao menu 1-SIM \n");
scanf("%d", &opc);
switch (opc){

}
}

getchar();
char *textonome="NOME:";
char *texto1=t.nome;
char *texto2="CPF:";
char *texto3=t.cpf;
char *texto4="RG:";
char *texto5=t.rg;
char *texto6="TELEFONE:";
char *texto7=t.telefone;
char *texto8="ENDERECO:";
char *texto9=t.ende;
char *texto10="SEXO:";
char *texto11=t.sexo;
char *texto12="NACIONALIDADE:";
char *texto13=t.nacionalidade;
char *texto14="HORA DA ENTRADA:";
char *texto15=t.hora_entrada;
char *texto16="HORA DA SAIDA:";
char *texto17=t.hora_saida;


fputs(textonome,trab);
fputs(texto1,trab);
fputs(texto2,trab);
fputs(texto3,trab);
fputs(texto4,trab);
fputs(texto5,trab);
fputs(texto6,trab);
fputs(texto7,trab);
fputs(texto8,trab);
fputs(texto9,trab);
fputs(texto10,trab);
fputs(texto11,trab);
fputs(texto12,trab);
fputs(texto13,trab);
fputs(texto14,trab);
fputs(texto15,trab);
fputs(texto16,trab);
fputs(texto17,trab);
fclose(trab);
return t;
}
if(num1==4){
FILE *trab;
int ch;
trab = fopen("Cad_Cliente.txt","r");
if(trab == NULL){
printf("Arquivo inexistente!!!");
system("pause");

}
while((ch = fgetc(trab)) != EOF){
printf("%c",ch);
}


}
}
void ALTERAR(void){
int pos;
pos=busca();
if (pos==-1)
{
printf("\nNumero inexistente no arquivo");
getch();
}
else if(pos==-2)
{
printf("\nNumero inexistente no arquivo!");
getch();
}
else
{
abrir("rb+");
fseek(ft,pos*sizeof(struct documento),SEEK_CUR);
fread(&t, sizeof(struct documento), 1, ft);t
printf("\nDeseja alterar o seguinte registro?");
printf("\n SEU NOME:%s",t.nome,40,stdin);
printf("\n SEU CPF:%s",t.cpf,14,stdin)
printf("\n SEU RG:%s",t.rg,12,stdin);
printf("\n SEU TELEFONE:%s",t.telefone,20,stdin);
printf("\n SEU ENDERECO:%s",t.ende,30,stdin);
printf("\n SEU SEXO:%s",t.sexo, 15, stdin);
printf("\nSUA NACIONALIDADE:%s",t.nacionalidade, 15, stdin);
printf("\n SUA HORA DE CHEGADA:%s",t.hora_entrada, 10, stdin);
printf("\n SUA HORA DE SAIDA:%s",t.hora_saida, 10, stdin);
getch();
printf("\nDigite as informacoes corretas:");
printf("\nNOME:");
gets(t.nome);
printf("\nCPF:");
gets(t.cpf);
printf("\nRG:");
gets(t.rg);
printf("\nTELEFONE:");
gets(t.telefone);
printf("\nENDERECO:");
gets(t.ende);
printf("\nSEXO:");
gets(t.sexo);
printf("\nNACIONALIDADE:");
gets(t.nacionalidade);
printf("\nHORA DE CHEGADA:");
gets(t.hora_entrada);
printf("\nHORA DE SAIDA:");
gets(t.hora_saida);
t.status='1';
fseek(ft,pos*sizeof(struct documento),SEEK_SET);
if(fwrite(&t, sizeof(struct documento),1, ft)!=1)
{
printf("\nErro na gravacao!");
}
else
{
printf("\nAlteracao feita com sucesso!");
getch();
}
}
fclose(ft);
}

int main(){

trabalho x[100];
int cont;
int num, num2;
while(num!=0){
num=menu();
switch(num){
case 1: x[cont]=cliente();
cont++;
break;
case '2':
system("exit");
break;

}
}
} 

[iQChange]

Cara, pelo que percebo você fala português.
Você poderia postar os erros?

Você está cometendo erros HORRÍVEIS.

1. Usando system("alguma_coisa");
É apenas para um único SO (use exit(STATUS_DE_RETORNO_INTEIRO) para sair do programa);
2. Como mais importante: você não está definindo onde estão suas funções.
Uma estrutura de dados é onde você armazena dados (óbvio). Se você o usa dessa maneira, precisa declará-lo como estático (static), ou criar um objeto.
3. Isso NÃO É C++.
Você está usando C com as Orientação-à-objetos do C++.
4. Faltaram MUITOS pontos e vírgulas no seu código.

Espero que , quando você arrumar essas coisas, o código funcione.
Até mais!
[]'s
------
English
------
Can you post the errors?

I've saw these:

1. (BAD) Using system("something");
It's SO dependent (use exit(INT_RETURN_STATUS) to exit the program);
2. Your compiler don't know where are the functions.
You need to set them as static, or create an object.
3. That's not C++
You are only using classes, but all the functions are from C.
4. Semicolons (;).

When you make these things right, I hope that your code works.
Good bye!

[iQChange]

Your code is poor-like :(
I've fixed (almost everything) it. You can get it here: http://pastebin.com/hiXmAMAu
But in lines 184, 185 and 228, you'll get some errors, because I don't know what you want with t and ft , and function buscar() is empty too, change it. For other issues, see the coments in the code.

Bye!