Function-4

#include<stdio.h>
const int MAXSIZE=100;
float checking_balance(float a[],int x);
float deposit(float a[], int x, int y);
float withdraw(float a[], int x, int y);
float transfer();
int main()
{
    float account[MAXSIZE];
    int n,e,f,g;
    printf("Enter number of customers:");
    scanf(" %d", &n);
    printf("Enter amount in each customer's account:");
    char c;
    for(int i=1;i<=n;i++)
    {
        scanf("%f", &account[i]);
    }
    printf("Select one of the following ATM operations\n");
    printf("Checking the balance amount (B)\n");
    printf("Withdrawing the amount from the account (W)\n");
    printf("Depositing the amount to the account (D)\n");
    printf("Transfer (T)\n");
    printf("Enter choice:\n");
    scanf(" %c", &c);
    switch(c)
    {
        case 'B':
        {
            printf("Enter debit account number:");
            scanf(" %d", &e);
            printf("Current balance in account #%d is %f", e,checking_balance(account,e));
            break;
        }

        case 'D':
        {
            printf("Enter credit account number:");
            scanf(" %d", &e);
            printf("Enter the amount to be deposited:");
            scanf(" %d", &f);
            printf("Current balance in account #%d is %f", e,deposit(account,e,f));
            break;
        }

        case 'W':
        {
            printf("Enter debit account number:");
            scanf(" %d", &e);
            printf("Enter the amount to be withdrawn:");
            scanf(" %d", &f);
            printf("Current balance in account #%d is %f", e,withdraw(account,e,f));
            break;
        }
        case 'T':
        {
            printf("Enter debit account number:");
            scanf(" %d", &e);
            printf("Enter credit account number:");
            scanf(" %d", &g);
            printf("Enter amount to deposit:");
            scanf(" %d", &f);
            transfer(account,e,g,f);
            break;
        }
    }
    return 0;
}

float checking_balance(float a[],int x)
{
    return a[x];
}

float deposit(float a[], int x, int y)
{
    a[x]=a[x]+y;
    return checking_balance(a,x);
}

float withdraw(float a[], int x, int y)
{

    if((a[x]-y)>=0)
    {
        a[x]=a[x]-y;
        return checking_balance(a,x);
    }

    else
    {
        printf("Sorry the transaction isn't possible\n");
        return checking_balance(a,x);

    }
}

float transfer(float a[],int x, int y,int z)
{
    if((a[x]-z)>=0)
    {
        printf("Current balance in account #%d is %f\n", x,withdraw(a,x,z));
        printf("Current balance in account #%d is %f\n", y,deposit(a,y,z));
    }

    else
    {
        printf("Sorry the transaction isn't possible\n");
        printf("Current balance in account #%d is %f\n", x,checking_balance(a,x));
        printf("Current balance in account #%d is %f\n", y,checking_balance(a,y));
    }
}