How to fix the "undefined references to GetString" error?

Question

I can't get the GetString() function from the cs50 library to work. I have tried update50 and have rebooted several times and it is still throwing out this error:

jharvard@appliance (~/Dropbox): make hello-2
g++     hello-2.C  -lcs50 -lm -o hello-2
/tmp/cckhwx2U.o: In function `main':
hello-2.C:(.text+0x16): undefined reference to `GetString()'
collect2: error: ld returned 1 exit status
make: *** [hello-2] Error 1

[Included code from comment]

#include <cs50.h>
#include <stdio.h>
int main(void)
{
    printf("Your name please: ");
    string name = GetString();
    printf("hello, %s\n", name);
}

Answer 1

I have this exact same problem.I have uploaded into the terminal the CS50 Library but this doesn't seem to have solved the issue. with either float or string

[Houndhill@localhost Documents]$ make hello cc hello.c -o hello /tmp/ccnCE1fi.o: In function main': hello.c:(.text+0x18): undefined reference toGetFloat' collect2: error: ld returned 1 exit status : recipe for target 'hello' failed make: *** [hello] Error 1 [Houndhill@localhost Documents]$

This is becoming very frustrating could you help please.