Simple Billing System Program in C

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <time.h>

#include <windows.h>

struct Billing

{

char g[50],m,e;

int q;

float r,d;

float amount;

float tax;}s;

int c;

static char mo, pa, g[50];

static int qq;

int distim();

int datess();

int timess();

int copy();

void office();

void customer();

void help();

void about();

void search();

void showall();

void add();

void remov();

void edit();

void ex();

main()

{

system("color 0a");

char x;

while(1)

{

system("cls");

distime();

printf("\t\t###############################################\n\t\t##\tLA Grandee Departmental Store\t     ##\t\t\n\t\t##\t-----------------------------\t     ##\n\t\t##\tSrijana Chowk, Pokhara, Nepal\t     ##\n\t\t##\t\t\t\t\t     ##\n\t\t##\t     Ph no: 061-123456\t\t     ##\n\t\t##\t\t\t\t\t     ##\n\t\t###############################################");

printf("\n\n\n\t ");

printf("\t1.OFFICE USE\t\t\t2.CUSTOMER USE\n\n\t\t3.HELP\t\t\t\t4.ABOUT\n\n\t\t\t\t5.EXIT\n\n");

printf("\tCHOOSE THE ABOVE OPTION TO OBTAIN A TASK:-\t");

x=getche();

x=toupper(x);

system("cls");

switch(x)

{

case '1':

printf("\n\t\tYou have selected for OFFICE USE:-");

office();

break;

case '2':

printf("\n\t\tYou have Seleced for CUSTOMER USE\n\n\n\t");

customer();

break;

case '3':

printf("\n\t\t\tHELP:");

help();

break;

case '4':

printf("\n\t\t\tABOUT US:-\n\n   ");

about();

break;

case '5':

ex();

break;

case 'S':

system("systeminfo");

printf("\n\t\t\tPress any key to continue");

break;

case 'B':

system("bill.txt");

printf("\n\n\n\n\t\t\tPress Any key to continue");

break;

case 'C':

printf("\n\n\n\t\t\tCOLOR changed Applied");

system("color 1a");

break;

default:

system("cls");

printf("\aIncorrect Input");

printf("\nAny key to continue");

}

binaya:

getch();

}

{

printf("\n\t\t            Date : ");

system("date /t");

printf("\t\t            Time : ");

system("time /t");

printf("\n");

}

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