I dare you to find what is wrong. It wont compile. Please i dare you!

[protoolspower]

My code will not compile. How do i get the string to work correctly? I am used exactly what my professer put on the board. This program should be compiling.
I am not sure how to apply the C++ strings.

#include <iomanip>
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main()
{

struct{int chronum;string pname;int next;}//makes structure box with C++ style string
plist[50],temp;//give the number of colmns
int n=0,end,maxindex,i;
ifstream fin;
ofstream fout;
fin.open("pres.dat");
fout.open("hw7.dat");
fin>>plist[n].pname;//inputs president name into list
while(!fin.eof())
{
plist[n].chronum=n+1;//assigns chronum to presidents as inputed.
n++;//tracks current president
fin>>plist[n].pname;
}
for(end=n-1;end>0;end--)
{
maxindex=0;
for(i=1;i<=end;i++)

if(plist[i].pname>plist[maxindex].pname)
maxindex=i;
temp=plist[maxindex];
plist[maxindex]=plist[end];
plist[end]=temp;
}
//cout.setf(ios::fixed);
//cout.setf(ios::showpoint);
//cout.precision(2);
//cout<<plist[i].chronum<<plist[i].pname<<endl;
return 0;
}

[Peter87]

Please put your code inside code tags next time [code] /* code here */[/code]. It makes it much easier to read your code. It also adds line numbers which is good when pointing out what line is wrong.

Make sure the files was opened correctly.

[kbw]

... and please post the exact error verbatim. You shouldn't expect us to actually compile the code.

[protoolspower]

this is the exact error when the above code is compiled





-------------------------------------------------
cwilson@orion Hw7]$ gcc hw7.cpp
/tmp/ccD0V7x7.o: In function `main::._84::._84()':
hw7.cpp:(.text+0x15): undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string()'
/tmp/ccD0V7x7.o: In function `main::._84::~._84()':
hw7.cpp:(.text+0x31): undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string()'
/tmp/ccD0V7x7.o: In function `main::._84::operator=(._84 const&)':
hw7.cpp:(.text+0x65): undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator=(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/tmp/ccD0V7x7.o: In function `__static_initialization_and_destruction_0(int, int)':
hw7.cpp:(.text+0xa1): undefined reference to `std::ios_base::Init::Init()'
/tmp/ccD0V7x7.o: In function `__tcf_0':
hw7.cpp:(.text+0xe4): undefined reference to `std::ios_base::Init::~Init()'
/tmp/ccD0V7x7.o: In function `main':
hw7.cpp:(.text+0x1ee): undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::basic_ifstream()'
hw7.cpp:(.text+0x1fa): undefined reference to `std::basic_ofstream<char, std::char_traits<char> >::basic_ofstream()'
hw7.cpp:(.text+0x210): undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::open(char const*, std::_Ios_Openmode)'
hw7.cpp:(.text+0x232): undefined reference to `std::basic_ofstream<char, std::char_traits<char> >::open(char const*, std::_Ios_Openmode)'
hw7.cpp:(.text+0x260): undefined reference to `std::basic_istream<char, std::char_traits<char> >& std::operator>><char, std::char_traits<char>, std::allocator<char> >(std::basic_istream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&)'
hw7.cpp:(.text+0x2b1): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::ios_base& (*)(std::ios_base&))'
hw7.cpp:(.text+0x2bf): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setw)'
hw7.cpp:(.text+0x2cc): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
hw7.cpp:(.text+0x2da): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setw)'
hw7.cpp:(.text+0x2e7): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
hw7.cpp:(.text+0x2f5): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setw)'
hw7.cpp:(.text+0x302): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
hw7.cpp:(.text+0x310): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, std::_Setw)'
hw7.cpp:(.text+0x31d): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
hw7.cpp:(.text+0x325): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
hw7.cpp:(.text+0x32a): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))'
hw7.cpp:(.text+0x332): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
hw7.cpp:(.text+0x337): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))'
hw7.cpp:(.text+0x393): undefined reference to `std::basic_istream<char, std::char_traits<char> >& std::operator>><char, std::char_traits<char>, std::allocator<char> >(std::basic_istream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&)'
hw7.cpp:(.text+0x3a6): undefined reference to `std::basic_ios<char, std::char_traits<char> >::eof() const'
hw7.cpp:(.text+0x4dd): undefined reference to `std::basic_ofstream<char, std::char_traits<char> >::~basic_ofstream()'
hw7.cpp:(.text+0x4f9): undefined reference to `std::basic_ofstream<char, std::char_traits<char> >::~basic_ofstream()'
hw7.cpp:(.text+0x50e): undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::~basic_ifstream()'
hw7.cpp:(.text+0x52a): undefined reference to `std::basic_ifstream<char, std::char_traits<char> >::~basic_ifstream()'
/tmp/ccD0V7x7.o: In function `bool std::operator><char, std::char_traits<char>, std::allocator<char> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
hw7.cpp:(.text._ZStgtIcSt11char_traitsIcESaIcEEbRKSbIT_T0_T1_ES8_[bool std::operator><char, std::char_traits<char>, std::allocator<char> >(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)]+0x19): undefined reference to `std::basic_string<char, std::char_traits<char>, std::allocator<char> >::compare(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const'
/tmp/ccD0V7x7.o:(.eh_frame+0x13): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status
-------------------------------------------

[kbw]

And that's generated from the code you posted? I don't think so.

Your code doesn't have the text 84 in it anywhere, so the input you provided can't generate those errors.