Which of the following statement is correct about the program?

#include<stdio.h>

int main()
{
    FILE *fp;
    char str[11], ch;
    int i=0;
    fp = fopen('INPUT.TXT', 'r');
    while((ch=getc(fp))!=EOF)
    {
        if(ch == '\n' || ch == ' ')
        {
            str[i]='\0';
            strrev(str);
            printf('%s', str);
            i=0;
        }
        else
            str[i++]=ch;
    }
    fclose(fp);
    return 0;
}