Program to create a file on disk & save a data by using fopen function in c

#include
Main()
{
    FILE *f1;
    char c;
    printf("Data Input\n");

    f1=fopen("INPUT","w");
    while((c=getchar())!=EOF)
    {
        putc(c,f1);
    }
    fclose(f1);

    f1=fopen("INPUT","r");
    while((c=getc(f1))!=EOF)
    {
        printf("%c", c);
    }
    fclose(f1);