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POIn my program what is the difference between Record* and Databse*?
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I am using Dev C++ compiler. So, what's wrong in here, i am getting errors in the addRecord Module. The compile log : <pre><code>Compiler: Default compiler Executing g++.exe... g++.exe "C:\SAI,MANI\test_add(09.03.2013).cpp" -o "C:\Users\Ravitheja\Desktop\C and C++\Projects\SAI,MANI\test_add(09.03.2013).exe" -O3 -g3 -I"C:\Dev-Cpp\lib\gcc\mingw32\3.4.2\include" -I"C:\Dev-Cpp\include\c++\3.4.2\backward" -I"C:\Dev-Cpp\include\c++\3.4.2\mingw32" -I"C:\Dev-Cpp\include\c++\3.4.2" -I"C:\Dev-Cpp\include" -L"C:\Dev-Cpp\lib" -g3 C:\SAI,MANI\test_add(09.03.2013).cpp: In function `void addRecord(Record*)': C:\SAI,MANI\test_add(09.03.2013).cpp:151: error: using typedef-name `Record' after `struct' C:\SAI,MANI\test_add(09.03.2013).cpp:151: error: cannot convert `Record*' to `Database*' in assignment C:\SAI,MANI\test_add(09.03.2013).cpp:153: error: expected primary-expression before '*' token C:\SAI,MANI\test_add(09.03.2013).cpp:153: error: expected primary-expression before ')' token C:\SAI,MANI\test_add(09.03.2013).cpp:153: error: expected `;' before "malloc" C:\SAI,MANI\test_add(09.03.2013).cpp:154: error: cannot convert `Record*' to `Database*' in assignment C:\SAI,MANI\test_add(09.03.2013).cpp: In function `void viewRecords(Record*)': C:\SAI,MANI\test_add(09.03.2013).cpp:180: error: cannot convert `Database*' to `Record*' in assignment C:\SAI,MANI\test_add(09.03.2013).cpp: In function `int getDate(date*)': C:SAI,MANI\test_add(09.03.2013).cpp:187: error: conversion from `date*' to non-scalar type `date' requested Execution terminated </code></pre> particularly in this line , <blockquote> <code>x->next = (Record*)malloc(sizeof(struct Record));</code> </blockquote> i am getting an error : cannot convert 'Record*' to ' Database*' in assignment, but what is the difference between Record and Database, as i have typedef-ed them. I have not written all the modules yet, i just wanted to test my addRecord() and viewRecords() , but it's not working. How to correct these errors ? <pre><code>#include<iostream> #include<conio.h> #include<stdlib.h> #include<malloc.h> using namespace std; // global declarations and function prototypes.... const int TRUE = 1,FALSE = 0,SUCCESS = 1; const int SUBJECTS = 3; typedef char String[25]; // date structure , a better way to store dates. struct date { int day,month,year; }; // Database structure , the main double linked list which stores all the information. typedef struct DataBase { String Name,FatherName,Address,Hometown; float Marks[SUBJECTS],Total,Percentage; date DOB; long int RegNo,PhoneNumber; struct Database *previous; // the addresses of the next and previous nodes in the dll. struct Database *next; }Record; int main(); int menu(); // for displaying menu. void process(int,Record*); // for processing the menu. void addRecord(Record*); // for adding a record. void delRecord(Record*); // for deleting a record. void modRecord(Record*); // for modifying values of a record. void sortRecords(Record*); // for sorting records. void filterRecords(Record*); // for filtering records. void searchRecords(Record*); // for searching a record. void viewRecords(Record*); // for viewing records (all). int getDate(date*); // for getting input for a date. void copyDate(date,date*); // for copying two date variables. int checkDate(date); // for checking wether a given date is correct. char *toString(int); // for displaying month name given the month number. void copyRecord(Record*,Record*); // for copying contents of one record into another. // main function... int main() { Record *r; r = (Record*) malloc (sizeof(Record)); r->next = NULL; r->previous = NULL; while(1) { process(menu(),r); } } // the menu function. int menu() { static int choice; cout<<"\n\t\t\t Menu"; cout<<"\n\t\t\t 1.Add Records "; cout<<"\n\t\t\t 2.Delete Records"; cout<<"\n\t\t\t 3.Modify Records"; cout<<"\n\t\t\t 4.Sort Records"; cout<<"\n\t\t\t 5.Filter Records"; cout<<"\n\t\t\t 6.Search Records"; cout<<"\n\t\t\t 7.View Records"; cout<<"\n\t\t\t 8.Exit"; cout<<"\n\t\t\t YOUR CHOICE : "; cin>>choice; if(choice>=1 && choice<=7) return choice; else if(choice == 8) exit(0); else { cout<<"\n Sorry, that's an invalid choice."; cout<<"\n Please Try Again."; menu(); } } void process(int choice,Record *r) { switch(choice) { case 1: addRecord(r); break; case 2: delRecord(r); break; case 3: modRecord(r); break; case 4: sortRecords(r); break; case 5: filterRecords(r); break; case 6: searchRecords(r); break; case 7: viewRecords(r); break; } } void addRecord(Record *x) { date *t; t = (date*) malloc ( sizeof(date) ); fflush(stdin); Record *temp; temp = (Record*) malloc ( sizeof(Record) ); cout<<"\n Enter the following details ..... "<<endl; cout<<"\n Name : "; gets(temp->Name); cout<<"\n Father's Name : "; gets(temp->FatherName); cout<<"\n Address :"; gets(temp->Address); cout<<"\n Hometown : "; gets(temp->Hometown); cout<<"\n Register Number : "; cin>>temp->RegNo; temp->Total = 0; for(int i=0;i<SUBJECTS;i++) { cin>>temp->Marks[i]; temp->Total += temp->Marks[i]; } temp->Percentage = temp->Total/SUBJECTS; cout<<"\n Total Marks : "<<temp->Total; cout<<"\n\n Percentage : "<<temp->Percentage; if(getDate(t) == SUCCESS) // trick! copyDate(temp->DOB,t); x->next = (Record*)malloc(sizeof(struct Record)); copyRecord(x,temp); temp->previous = (Record*)malloc(struct Database); temp->previous = x; temp->next = NULL; return; } void viewRecords(Record *x) { if(x->next == NULL && x->previous == NULL) { cout<<"\n There are no records to view."; cout<<"\n Please Add some records and then try again!"; return; } do { cout<<"\n Name : "<<x->Name; cout<<"\n Father's Name : "<<x->FatherName; cout<<"\n Address : "<<x->Address; cout<<"\n Hometown : "<<x->Hometown; cout<<"\n Register Number : "<<x->RegNo; for(int i=0;i<SUBJECTS;i++) cout<<"\n Mark "<<i+1<<" : "<<x->Marks[i]; cout<<"\n Total Marks : "<<x->Total<<endl; cout<<"\n Percentage : "<<x->Percentage; cout<<"\n Date Of Birth : "<<x->DOB.day<<"th"<<toString(x->DOB.month)<<" "<<x->DOB.year; if(x->next == NULL) break; }while((x=x->next)!=NULL); } int getDate(date *t) { cout<<"\nDate of birth (dd:mm:yyyy) : "; scanf("%d:%d:%d",&t->day,&t->month,&t->year); if(checkDate(t) == SUCCESS) return SUCCESS; else { cout<<"\n Sorry, that's not a valid Date."; cout<<"\n Please Try Again,"<<endl; getDate(t); } } void copyDate(date d1,date *d2) { d1.day = d2->day; d1.month = d2->month; d1.year = d2->year; return; } int checkDate(date *x) { int leap = (x->year%4==0)?TRUE:FALSE; if( ( x->day<=0 || x->day > 31 ) || (x->month>12 || x->month<=0) || (x->year<1900 || x->year > 2008) ) return FALSE; else if(leap == TRUE && x->month == 2 && (x->day>29)) return FALSE; else if(leap == FALSE && x->month == 2 && (x->day>28)) return FALSE; else if( (x->month == 4 || x->month == 6 || x->month == 9 || x->month == 11) && x->month >= 31 ) return FALSE; else return TRUE; } char *toString(int m) { char *t = (char*) malloc (sizeof(char)*4); switch(m) { case 1 : t = "Jan"; break; case 2 : t = "Feb"; break; case 3 : t = "Mar"; break; case 4 : t = "Apr"; break; case 5 : t = "May"; break; case 6 : t = "Jun"; break; case 7 : t = "Jul"; break; case 8 : t = "Aug"; break; case 9 : t = "Sep"; break; case 10 : t = "Oct"; break; case 11 : t = "Nov"; break; case 12 : t = "Dec"; break; } return t; } </code></pre>
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In my program what is the difference between Record* and Databse*?
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