code_offline

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
struct customer
{
    char name[100];
    char accNo[10];
    char mobileNo[11];
    double balance;

};

int findAcc(struct customer *c,char *acc,int n)
{

    for(int i=0; i<n; i++)
    {
        if(strcmp((c+i)->accNo,acc)==0)
            return i;
    }
}

int findmobile(struct customer *c,char *acc,int n)
{

    for(int i=0; i<n; i++)
    {
        if(strcmp((c+i)->mobileNo,acc)==0)
            return i;
    }
    return n;

}
void printcustomer(struct customer *c,int n)
{
    for(int i=0; i<n; i++)
    {
        printf("Name: %s ",(c+i)->name);
        printf("Account No: <%s> ",(c+i)->accNo);
        printf("Mobile No: %s ",(c+i)->mobileNo);
        printf("Balance: %lf\n",(c+i)->balance);
    }
}
double balanceSum(struct customer *c,int n,double sum)
{
    for(int i=0; i<n; i++)
    {
        sum+=(c+i)->balance;
    }
    return sum;
}

void sortcustomer(int n,struct customer *c)
{
    printf("Sorted successfully\n");
    for(int i=0;i<n-1;i++)
    {
        for(int j=0;j<n-1-i;j++)
        {
            if((c+i)->balance< (c+i+1)->balance){
                float temp=(c+i)->balance;
                (c+i)->balance=(c+i+1)->balance;
                (c+i+1)->balance=temp;
                char *p=(c+i)->name;
                strcpy((c+i)->name,(c+i+1)->name);
                strcpy((c+i+1)->name,p);
                char *q=(c+i)->mobileNo;
                strcpy((c+i)->mobileNo,(c+i+1)->mobileNo);
                strcpy((c+i+1)->mobileNo,p);
                char *r=(c+i)->accNo;
                strcpy((c+i)->accNo,(c+i+1)->accNo);
                strcpy((c+i+1)->accNo,p);

            }
        }
    }
    return;
}

int main()
{
    int n;
    printf("enter number of customers:");
    scanf("%d",&n);
    //char a[2];
    if(n<0 || n>100)printf("invalid input");
    else
    {

        struct customer *c=(struct customer*)malloc(n*sizeof(struct customer));
        for(int i=0; i<n; i++)
        {


            printf("enter customer name:");
            scanf("%s",(c+i)->name);
            printf("enter account no:");
            scanf("%s",(c+i)->accNo);
            printf("enter mobile no:");
            scanf("%s",(c+i)->mobileNo);
            fflush(stdout);
            printf("enter balance: ");
            scanf("%lf",&(c+i)->balance);
            //gets(a);
        }



        while(1)
        {

            fflush(stdout);
            printf("\nPlease select an option\n");
            printf("Choose 1 to deposit money.\n");
            printf("Choose 2 to withdraw money.\n");
            printf("Choose 3 to sort all customers by using their salary.\n");
            printf("Choose 4 to search customers by using their mobileNo.\n");
            printf("Choose 5 to print all the customers.\n");
            printf("Choose 6 to print the sum of all customer balances.\n");
            printf("Choose 0 to exit.");
            printf("Enter you option:\n");

            int x;
            scanf("%d",&x);
            if(x==0)break;
            else if(x==1)
            {
                char *acc;
                double money;
                printf("enter account no: ");
                scanf("%s",acc);
                printf("enter amount to deposit:");
                scanf("%lf",&money);
                int y=findAcc(c,acc,n);
                (c+y)->balance=(c+y)->balance+money;
                //printf("%lf",(c+y)->balance);
            }
            else if(x==2)
            {
                char acc2[10];
                double withdrawmoney;
                printf("enter account no: ");
                scanf("%s",acc2);
                printf("enter amount to withdraw:");
                scanf("%lf",&withdrawmoney);
                int y=findAcc(c,acc2,n);
                (c+y)->balance=(c+y)->balance-withdrawmoney;
                //printf("%lf",(c+y)->balance);


            }
            else if(x==3)
            {
                sortcustomer(n,c);
                printcustomer(c,n);
            }
            else if(x==4)
            {
                char mobile[12];
                scanf("%s",mobile);
                int y=findmobile(c,mobile,n);
                if(y==n)printf("customer not found");
                else
                    printf("customer name %s",(c+y)->name);
            }
            else if(x==5)
            {
                printcustomer(c,n);
            }
            else if(x==6)
            {
                printf("sum of balance of customers: %lf",balanceSum(c,n,0));
            }
            else{
                printf("invalid input");
            }
        }

        free(c);

    }
    return 0;
}