Errors when compiling

[shaqywacky]

Hey everyone, I just started learning C++ and everything was going fine for a while but now when ever I try to compile something a get all these errors:

C:\DOCUME~1\dylan\LOCALS~1\Temp/ccZMUTUG.o:ptest.cpp:(.text+0xd): undefined refe
rence to `std::string::size() const'
C:\DOCUME~1\dylan\LOCALS~1\Temp/ccZMUTUG.o:ptest.cpp:(.text+0x60): undefined reference to `std::string::operator[](unsigned int) const'
C:\DOCUME~1\dylan\LOCALS~1\Temp/ccZMUTUG.o:ptest.cpp:(.text+0x9e): undefined reference to `std::string::operator[](unsigned int) const'
C:\DOCUME~1\dylan\LOCALS~1\Temp/ccZMUTUG.o:ptest.cpp:(.text+0xcc): undefined reference to `std::string::operator[](unsigned int) const'
C:\DOCUME~1\dylan\LOCALS~1\Temp/ccZMUTUG.o:ptest.cpp:(.text+0x141): undefined reference to `std::cout'
C:\DOCUME~1\dylan\LOCALS~1\Temp/ccZMUTUG.o:ptest.cpp:(.text+0x146): undefined reference to `std::ostream::operator<<(void const*)'
C:\DOCUME~1\dylan\LOCALS~1\Temp/ccZMUTUG.o:ptest.cpp:(.text+0x16f): undefined reference to `std::ios_base::Init::Init()'
C:\DOCUME~1\dylan\LOCALS~1\Temp/ccZMUTUG.o:ptest.cpp:(.text+0x18a): undefined reference to `std::ios_base::Init::~Init()'
collect2: ld returned 1 exit status

I'm using minGW and I tried reinstalling it but it just gets the same errors. I don't have a clue what they mean.

Any ideas?

[helios]

That's very weird. Standard functions are defined in the headers, so you should never get linker errors. If the program compiled, it should link with no problems.
Post your code.

[shaqywacky]

I just noticed that if #include <iostream> is used it gets these errors, but just in case:

#include <iostream>
using namespace std;
int main()
{
double *p, cat;
cat = 2000;
p = &cat;

cout << p;
}