fgets and newline or not

[VanKha]

I use fgets to do some simple file input . In the sample text file used to read , if I don't include a newline at the last line , that line is missed !

int main()
{
    FILE* fp=fopen("sample.txt","rt");
    char temp[100];
    while(1)
    {
        fgets(temp,100,fp);
        if(feof(fp))
            break;
        cout<<temp;
    }
    return 0;
}
 

For example , sample.txt is
1
2
3
4
if I forget the newline after 4 , the program only prints
1
2
3
Why it works like this ?
And how can I fix it ?

[weaknessforcats]

Line 4 is not considered entered until it has a newline.