C: structures, easy, full short program code shown -

here program. commented aims etc. issues two:

a) typical error of "data definition has no type or storage class when create prototypes of functions.

b) after entering input scanf question , pressing enter, still have type letter , again press enter continue through program, otherwise not progress: thanks

#include<stdio.h> #include<conio.h> #include<stdlib.h> #include<string.h>   /* object:  * program allows upon user input recreate structures  * different names. except when entering 'n',  * ask "do want create new book (structure)?   * storing books, title, author, price, , pages */    // 1. create blue print of structure (forget typedef...)          struct book {         char title[100];         int pages;         int price;         char author[50];         } ;  // 2. declare variables  char wants; char name [30];   // 3. function prototypes  question(); create_structure_name();   // +++++++++++++++++++++++++++++++++++++++++++++++++++                    create_structure_name(){    printf("give name structure: ");   fflush(stdin);   scanf("%s\n", &name);     printf("you have chosen name %s structure: \n", name);   struct book name;           printf("title: ");   fflush(stdin);   scanf("%s\n", &name.title);   printf("the title %s: ", name.title);            printf("paginas: ");   fflush(stdin);   scanf("%d\n", &name.pages);   printf("it has number of pages %d\n: ", name.pages);    printf("price: ");   fflush(stdin);   scanf("%d\n", &name.price);   printf("the price %d: ", name.price);    printf("author: ");   fflush(stdin);   scanf("%s\n", &name.author);   printf("the author %s: ", name.author);        }        // define function ++++++++++++++++++++++++++++  question() { printf("do want create new book? :"); fflush(stdin); scanf("%c\n", &wants);      while(wants!= 'n')      {          create_structure_name();               }               }              // ++++++++++++++++++++++++++++++++++++++++++++++++++++                   main(void)         {         create_structure_name();         question();         system("pause");                    } 

firstly, formatting makes code not readable.

secondly main( should int main( , return result

thirdly, don't call fflush on input stream. has undefined behaviour.

fourthly, use scanf. never use scanf. ever. read whole line console (using fgets, not gets (which sets world of pain)) , use sscanf , please remember check result gets returned.