WHAT DID I DO?

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAXCHAR 16
#define MAXADD 51
#define MAXNAME 21
#define MAXCODE 9
#define MAXCART 100
typedef char Char [MAXCHAR];
typedef char Name [MAXNAME];
typedef char Add [MAXADD];
typedef char Code [MAXCODE];
typedef char Adcd [MAXCODE];
typedef struct {
	Name First;
	Name Second;
	Name Last;
}sName;
typedef struct {
	sName Userinfo;
	Add Address;
}Userinfo;
typedef struct {
	Code Prodcode;
	int qty;
}ProductTag;
typedef ProductTag arrBought[MAXCART];
typedef struct {
	Char username;
	Char password;
	Userinfo info;
	char type;
	float credlimit;
	float outstanding;
 	arrBought cart;
 	int nItems;
 	int count;
}Usertype;
typedef struct {
	Char supplier;
	Char product;
	int quantity;
	float puchase;
	float unit;
	float discount;
	int sold;
	Code code;
}Productlist;
typedef struct {
	Char category;
	Productlist list;
}Addstock;
void getUserinfo (Userinfo *uInfo){
	printf("Enter your First Name: ");
	fgets(uInfo->Userinfo.First ,MAXNAME,stdin);
	printf("Enter your Middle Name: ");
	fgets(uInfo->Userinfo.Second,MAXNAME,stdin);
	printf("Enter your Last Name: ");
	fgets(uInfo->Userinfo.Last,MAXNAME,stdin);
	printf("Enter your Address: ");
	fgets(uInfo->Address,MAXADD,stdin);
	uInfo->Userinfo.Last[strlen(uInfo->Userinfo.Last)-1]='\0';
	uInfo->Userinfo.First[strlen(uInfo->Userinfo.First)-1]='\0';
	uInfo->Userinfo.Second[strlen(uInfo->Userinfo.Second)-1]='\0';
	if (uInfo->Userinfo.First[0] >= 97 && uInfo->Userinfo.First[0] <=122)
		uInfo->Userinfo.First[0]-=32;
	if (uInfo->Userinfo.Second[0] >= 97 && uInfo->Userinfo.Second[0] <=122)
		uInfo->Userinfo.Second[0]-=32;
	if (uInfo->Userinfo.Last[0] >= 97 && uInfo->Userinfo.Last[0] <=122)
		uInfo->Userinfo.Last[0]-=32;
	printf("Your Name is: ");
	printf("%s, %s %s\n",uInfo->Userinfo.Last,uInfo->Userinfo.First,uInfo->Userinfo.Second);
	printf("Your Address is: ");
	printf("%s\n",uInfo->Address);
}
int passcheck (Usertype *user){
	int i,count=0;
	for (i=0;i<strlen(user->password);i++)
		if ((user->password[i] < 'A' || user->password[i] > 'Z'))
			if ((user->password[i] < 'a' || user->password[i] > 'z'))
			count++;
	if (count==0)
	printf("You must have at least 1 non-letter character\n");
	return count;
}
int length (Usertype *user){
	if (strlen (user->password) < 6){

		printf("password is too short \n");
		return 0;
}

	else if (strlen (user->password) > 15){
		printf("password is too long \n");
		return 0;
	}
	else 	return 1;
}
void Signup (Usertype *user){
	char cDump;
	Adcd Admincode;
	do{
	printf("Enter Username: ");
	scanf("%s%c",user->username,&cDump);
	} while (strlen (user->username) < 3|| strlen(user->username) > 15);
	printf("%s\n",user->username);

	do{
	printf("Enter Password: ");
	scanf("%s%c",user->password,&cDump);
	} while (length (user)==0 || passcheck(user)==0);

	printf("%s\n",user->password);

	getUserinfo (&user->info);
	printf("Enter account type [S]hopper or [A]dmin : ");
	scanf("%c",&user->type);
	if (user->type=='s'|| user->type=='S'){
		user->credlimit = 5000.00;
		user->outstanding = 0.00;
		user->nItems = 0;
	}
	else if (user->type == 'a' || user->type == 'A'){
			printf("Enter Admin Code: \n");
			do{
			scanf("%s",&Admincode);
			if (strcmp(Admincode,"DLSU2017")==0)
			user->type = 'A';
			} while (strcmp(Admincode,"DLSU2017")!=0);
}
	user->count=0;
}
int login (Usertype *user) {
	Char input;
	do {
		printf("Enter Username: ");
		scanf("%s",input);
		if (strcmp (user->username,input)==0 && user->count < 4){
			do{
			printf("Enter Password: ");
			scanf("%s",input);
			if (strcmp (user->password,input)!=0){
			printf("Try again, %d try/s left\n",3-user->count);
			user->count++;
			}
			} while (user->count <= 3 && strcmp (user->password,input) !=0);
			if (strcmp(user->password,input)==0)
				return 1;
			else if (user->count >= 3)
				return 0;
		}

	} while (strcmp (user->username,input));
}
void Adminmenu (Usertype *user,int *esc){
	int exit=1,input;
	do {
	printf("ADMIN MENU \n");
	printf("Choose an option \n");
	printf("Manage Accounts: 1 \n");
	printf("Manage Stocks: 2 \n");
	printf("Prepare Delivery Report: 3 \n");
	printf("Shutdown Kioski: 4 \n");
	printf("Log out: 5 \n");
	scanf("%d",&input);
		switch (input) {
	//	case 1: Manageaccounts (user);
	//	case 2: Managestocks (user);
	//	case 3: Deliveryreport (user);
		case 4: *esc = 0;  break;
		case 5: exit = 0;
		}
	} while (exit);
}
void Changename (Userinfo *uInfo){
	printf("Enter your First Name: ");
	fgets(uInfo->Userinfo.First,MAXNAME,stdin);
		fgets(uInfo->Userinfo.First,MAXNAME,stdin);
	printf("Enter your Middle Name: ");
	fgets(uInfo->Userinfo.Second,MAXNAME,stdin);
	printf("Enter your Last Name: ");
	fgets(uInfo->Userinfo.Last,MAXNAME,stdin);
	uInfo->Userinfo.Last[strlen(uInfo->Userinfo.Last)-1]='\0';
	uInfo->Userinfo.First[strlen(uInfo->Userinfo.First)-1]='\0';
	uInfo->Userinfo.Second[strlen(uInfo->Userinfo.Second)-1]='\0';
	if (uInfo->Userinfo.First[0] >= 97 && uInfo->Userinfo.First[0] <=122)
		uInfo->Userinfo.First[0]-=32;
	if (uInfo->Userinfo.Second[0] >= 97 && uInfo->Userinfo.Second[0] <=122)
		uInfo->Userinfo.Second[0]-=32;
	if (uInfo->Userinfo.Last[0] >= 97 && uInfo->Userinfo.Last[0] <=122)
		uInfo->Userinfo.Last[0]-=32;
	printf("Your New Name is: ");
	printf("%s, %s %s\n",uInfo->Userinfo.Last,uInfo->Userinfo.First,uInfo->Userinfo.Second);
}
void Changeadd (Userinfo *uInfo) {
	printf("Enter your Address: ");
	fgets(uInfo->Address,MAXADD,stdin);
		fgets(uInfo->Address,MAXADD,stdin);
	printf("Your New Address is: ");
	printf("%s\n",uInfo->Address);
}
void Changepass (Usertype *user) {
	char cDump;
	do{
	printf("Enter Password: ");
	scanf("%s%c",user->password,&cDump);
	} while (length (user)==0 || passcheck(user)==0);
	printf("Your new password is: ");
	printf("%s\n", user->password);
}
void Modifyinfo (Usertype *user) {
	int exit = 1,input;
	do {
		printf("Modify User Menu \n");
		printf("Choose an option \n");
		printf("Change Name: 1 \n");
		printf("Change Address: 2 \n");
		printf("Change Password: 3 \n");
		printf("Return to Shopper Menu: 4 \n");
		scanf("%d",&input);
		switch (input) {
			case 1: Changename (&user->info); break;
			case 2: Changeadd (&user->info); break;
			case 3: Changepass (user); break;
			case 4: exit = 0;
		}
	} while (exit);
}
void Settlebalance (Usertype *user) {
	int card,security,paid=1;
	float payment;
	printf("Your outstanding balance is %.2f \n",user->outstanding);
	printf("Enter your credit card number (without spaces): ");
	scanf("%d",&card);
	printf("Enter your security code: ");
	scanf("%d",&security);
	do {
	printf("Enter amount: ");
	scanf("%f",&payment);
	if (payment <= user->outstanding){
		user->outstanding -= payment;
		paid=0;
	}
	else
	printf("You entered too much!");
	} while (paid);
	printf("Your new balance is %.2f\n",user->outstanding);
}
void Shoppermenu (Usertype *user){
	int exit = 1,input;
	do {
		printf("Shopper Menu \n");
		printf("Choose an option \n");
		printf("Modify User Info: 1 \n");
		printf("Browse All Products: 2 \n");
		printf("Browse Products by Category: 3 \n");
		printf("Browse Products on Sale: 4 \n");
		printf("Add to Cart: 5 \n");
		printf("View Cart: 6 \n");
		if (user->outstanding != 0.00)
		printf("Settle Outstanding Balance: 7 \n");
		printf("Log out: 8 \n");
		scanf ("%d",&input);
		switch (input) {
			case 1: Modifyinfo (user); break;
			case 2:
			case 3:
			case 4:
			case 5:
			case 6:
			case 7: Settlebalance (user); break;
			case 8: exit = 0;
		}
	} while (exit);
}
int main () {
	int exit=1,input;
	Usertype user;
	do {
	printf("Main Menu \n");
	printf("Choose an option: \n");
	printf("Log-in : 1\n");
	printf("Sign-up : 2\n");
	printf("Exit : 3\n");
	scanf("%d",&input);
		switch (input){
			case 1: if (login (&user)){
				    if (user.type == 's' || user.type == 'S')
					Shoppermenu (&user);
					else if (user.type == 'A')
					Adminmenu (&user,&exit);
					} break;
			case 2: Signup (&user); break;
			case 3: printf("Exiting program\n"); exit=0; break;
		}
	} while (exit);
	return 0;
}