c - I can't input when my structure has integer and character variables -

the following program written in c

#include <stdio.h>  struct book {     char title[80] ;     char author[80];     int pages;     int datepb; };  struct book input_book(void) {     struct book b1;     gets(b1.title);     gets(b1.author);     scanf("%d" , &b1.pages);     scanf("%d" , &b1.datepb);     return b1; }     int main(int argc , char *argv[]) {     struct book b1[3];     int i;     (i = 0; < 3; ++i)     {         printf("enter book %d:\n" , + 1);         b1[i] = input_book();         printf("\n");     }     (i = 0; < 3; ++i)     {         printf("book %d:\n" , + 1);         printf("%s\t%s\t%d\t%d\n" , b1[i].title , b1[i].author , b1[i].pages , b1[i].datepb);         printf("\n");     }     return 0; } 

and output get:

enter book 1: 5 mistakes aaditua 532  enter book 2: 4 mistakes aaditya  enter book 3: 9 mistakes  aaditya  book 1: 5 mistakes   aaditua 581983988   532  book 2:     4 mistakes   1   32681  book 3: aaditya 9 mistakes   1   32681 

i don't that. can input every detail of first book , while can't enter integers in second , third book. please me out appropriate answers.

you may replace;

gets(b1.title);  // gets deprecated gets(b1.author); 

with

fgets(b1.title,80,stdin); fgets(b1.author,80,stdin); 

notice gets quite different fgets: not gets uses stdin source, not include ending newline character in resulting string , not allow specify maximum size str

then put

while(getchar()!='\n') // wasting unprocessed buffer   continue;; 

just after second scanf(). below reason :

gets() can take empty strings(see citation above). if terminal line buffered, after second scanf(), when press enter on keyboard, creates unprocessed \n stdin buffer , consumed next gets(). in other words next b1.title empty string. bad part messes whole input sequence afterwards.

reference: gets