I'm tasked with making an address book in the C programming language. Here is the code I have so far. #include #include #include #include //defining the properties of the fields used in the program #define NAME 50 #define ADDRESS 50 #define PHONE 20 #define EMAIL 20 #define SIZE 500 void Insert(); void Del_info(); void Display(); void Search(); void Exit(); char info[SIZE]; struct addressbook { char name [NAME] ; char address [ADDRESS]; char phone [PHONE]; char email [EMAIL] ; char Target[NAME]; }; //initializing the files used in the program FILE *AddressBook; FILE *rectemp; int main() { int choice=0; printf("Welcome \n"); printf("\n 1> Insert new Entry\n"); printf("\n 2> Delete Entry\n"); printf("\n 3> Display all Entry\n"); printf("\n 4> Search Entry\n"); printf("\n 5> Exit the program\n"); printf("\n Enter your choice : "); scanf("%i",&choice); switch (choice) { case 1: Insert(); break; case 2: Del_info(); break; case 3: Display(); break; case 4: Search(); break; case 5: exit(0); break; case 6: break; default: printf("**Invalid Input.**\n"); } return (0); } void Insert() { char choice1; do { //opening the AddressBook file AddressBook = fopen("AddressBook.txt","a+"); printf("Enter Person's Name\n"); scanf("%s",addressbook.name); printf("Enter Person's Address\n"); scanf("%s",addressbook.address); printf("Enter Person's Phone no.\n"); scanf("%s",addressbook.phone); printf("Enter Person's E-mail\n"); scanf("%s",addressbook.email); fprintf(AddressBook,"%s %s %s %s \n",addressbook.name,addressbook.address,addressbook.phone,addressbook.email); fclose(AddressBook); printf("Press y/Y to Execute the Program Again \n"); scanf("%c",&choice1); } while(choice1=='y'||choice1=='Y'); main(); } void Del_info() { char choice2; char Target[SIZE]; int Found=0; rectemp=fopen("rectemp.txt","w"); if((AddressBook=fopen("AddressBook.txt","r"))==NULL) printf("**The File is Empty**\n\n"); else{ printf("\tEnter Person's Name : "); gets(Target); while(!feof(AddressBook)) { fscanf(AddressBook,"%s %s %s %s",addressbook.name,addressbook.address,addressbook.phone,addressbook.email); if(feof(AddressBook)) break; if(strcmp(Target,addressbook.name)!=0) fprintf(rectemp,"%s %s %s %s \n",addressbook.name,addressbook.address,addressbook.phone,addressbook.email); else { Found=1; } if (!Found) { printf("\t**There is no such Entry\n"); } printf("\t**Item is Deleted**\n"); fclose(AddressBook); fclose(rectemp); remove("Addressbook.txt"); rename("rectemp.txt","AddressBook.txt"); do{ printf("Press y/Y to Execute the Program Again \n"); scanf("%c",&choice2); } while(choice2=='y'||choice2=='Y'); } } } void Display() { char choice3; AddressBook = fopen("AddressBook.txt","a+"); do { fgets(info,SIZE,AddressBook); printf("%s\n",info); }while(!feof(AddressBook)); fclose(AddressBook); do{ printf("Press y/Y to Execute the Program Again \n"); scanf("%c",&choice3); }while(choice3=='y'||choice3=='Y'); main(); } void Search() { char choice4; char Target[SIZE]; int Found=0; if((AddressBook=fopen("AddressBook.txt","r"))==NULL) printf("**The file is empty** !!\n\n"); else { printf("\tEnter The Name:"); scanf("%s",Target); while(!feof(AddressBook)&& Found==0) { fscanf(AddressBook,"%s %s %s %s ",addressbook.name,addressbook.address,addressbook.phone,addressbook.email); if(strcmp(Target,addressbook.name)==0) Found=1; } if(Found) { printf("The Name is: %s\n",addressbook.name); printf("The Address is: %s\n",addressbook.address); printf("The phone number is: %s\n",addressbook.phone); printf("The e-mail is: %s\n",addressbook.email); } else if(!Found) printf("**There is no such Entry**\n"); fclose(AddressBook); } do{ printf("Press y/Y to Execute the Program Again \n"); scanf("%c",&choice4); } while(choice4=='y'||choice4=='Y'); } void Exit() { exit(0); } When I compile it, I'm given three errors. Here is a screen shot of them. I'm using Code::Blocks 17.12.