Thread: How to improve this program

Code:

#include<stdio.h>
#include<conio.h>
#include<string.h>
struct student
{
    char name[50];
    int roll;
    char addrs [100];
};
main()
{
    struct student stu;
    FILE *fp;
    int ch;
    char c;
    char sn[50];
    printf("\n\t\t\t\tMENU:");
    printf("\n1. Update Record in the file");
    printf("\n2. Search by Name");
    printf("\n3. Exit");
    printf("\nEnter Choice: ");
    scanf("%d", &ch);


    switch(ch)
    {


    case 1:
        fp=fopen("student.txt", "ab");
        while (1)
        {
        printf("\nEnter Name: ");
        scanf("%s", stu.name);
        fflush(stdin);
        printf("\nEnter Roll No.: ");
        scanf("%d", &stu.roll);
        fflush(stdin);
        printf("\nEnter Address: ");
        scanf("%s", stu.addrs);
        fflush(stdin);
        fwrite(&stu,sizeof(stu),1,fp);
        printf("\nDo you want to continue?(Y/N): ");
        scanf("%c", &c);
        if(c=='n'||c=='N')
        {
            break;
        }
        }
        fclose(fp);
        break;
    case 2:
        fp=fopen("student.txt", "rb");
        printf("\nEnter Name: ");
        gets(sn);
        while(fread(&stu,sizeof(stu),1,fp))
        {
        if(strcmp(sn,&stu.name)==0)
        {
            printf("\n\t%s \t %d \t %s", stu.name, stu.roll, stu.addrs);
            getch();
            break;
        }
        }
        fclose(fp);
        getch();
        break;
    case 3:
        exit(1);
    }
}

What do i want ?
1. I want to store Name with space for example - Seth Rollins
2. I want to store Address with house number (integer value) and string with space for example - 234, Texas

Will somebody help me to modify this code with fgets function and i also do not want to use fflush function as it is not portable but without this function my code doesn't work properly.