C Program to write all the members of an array of strcures to a file using fwrite(). Read the array from the file and display on the screen.

#include <stdio.h>
struct s
{
char name[50];
int height;
};
int main(){
    struct s a[5],b[5];   
    FILE *fptr;
    int i;
    fptr=fopen("file.txt","wb");
    for(i=0;i<5;++i)
    {
        fflush(stdin);
        printf("Enter name: ");
        gets(a[i].name);
        printf("Enter height: "); 
        scanf("%d",&a[i].height); 
    }
    fwrite(a,sizeof(a),1,fptr);
    fclose(fptr);
    fptr=fopen("file.txt","rb");
    fread(b,sizeof(b),1,fptr);
    for(i=0;i<5;++i)
    {
        printf("Name: %s\nHeight: %d",b[i].name,b[i].height);
    }
    fclose(fptr);
}