vector

vector

[Dan Mergens]

I'm baffled why this simple program produces the following errors.
Strangly enough, if I remove the push_back call, it compiles without
complaint.

I'm running the latest version of cygwin. I'm sure I'm missing
something...

Thanks,
Dan

-------------- test.C ------------------
#include <vector>
void main() {
vector<int> array;
array.push_back(10);
}
----------------------------------------

$ gcc test.C

/cygdrive/c/DOCUME~1/dan/LOCALS~1/Temp/ccSFn9EF.o(.__malloc_alloc_template<0>::t

ext$_S_oom_malloc(unsigned int)+0x1a):main.C: undefined reference to
`endl(ostre
am &)'
/cygdrive/c/DOCUME~1/dan/LOCALS~1/Temp/ccSFn9EF.o(.__malloc_alloc_template<0>::t

ext$_S_oom_malloc(unsigned int)+0x27):main.C: undefined reference to
`cerr'
/cygdrive/c/DOCUME~1/dan/LOCALS~1/Temp/ccSFn9EF.o(.__malloc_alloc_template<0>::t

ext$_S_oom_malloc(unsigned int)+0x2c):main.C: undefined reference to
`ostream::o
perator<<(char const *)'
collect2: ld returned 1 exit status




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Re: vector

[Laurent Pinchart]

> I'm baffled why this simple program produces the following errors.
> Strangly enough, if I remove the push_back call, it compiles without
> complaint.
[...]

> $ gcc test.C
[...]

It's a C++ program. You have to use g++. Naming your file test.cpp instead of 
test.C would be a good idea too.

Laurent Pinchart


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Re: vector

[Gerrit P. Haase]

Hallo Laurent,

Am Donnerstag, 22. August 2002 um 10:15 schriebst du:

>> I'm baffled why this simple program produces the following errors.
>> Strangly enough, if I remove the push_back call, it compiles without
>> complaint.
> [...]

>> $ gcc test.C
> [...]

> It's a C++ program. You have to use g++. Naming your file test.cpp instead of 
> test.C would be a good idea too.

.C (upper case is an official filename suffix for C++ too!

Using g++ on this example gives errors too:
$ g++ -c vector.C
vector.C:2: `main' must return `int'
vector.C: In function `int main(...)':
vector.C:3: `vector' undeclared (first use this function)
vector.C:3: (Each undeclared identifier is reported only once for each function 
   it appears in.)
vector.C:3: parse error before `>' token
vector.C:4: `array' undeclared (first use this function)


Gerrit
-- 
perl -e 'print $i=pack(c5,(41*2),sqrt(7056),(unpack(c,H)-2),oct(115),10);'


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RE: vector

[Norman Vine]

Dan Mergens writes:
>
>I'm baffled why this simple program produces the following errors.
>Strangly enough, if I remove the push_back call, it compiles without
>complaint.
>
>I'm running the latest version of cygwin. I'm sure I'm missing
>something...
>
>Thanks,
>Dan
>
>-------------- test.C ------------------
>#include <vector>
>void main() {
>vector<int> array;
>array.push_back(10);
>}
>----------------------------------------

This is really OT for this list but since there have been several
similar posts recently 
 < please use a general C++ programming list >

try

// compile with g++ < or c++ >
//  c++ test.C
// if compiling with gcc libstdc++ must be linked explicitly
//  gcc test.C -lstdc++

#include <vector>
int main(void) {
  std::vector<int> array;
  array.push_back(10);
  return 0;
}

note that main() MUST be declared to return an int
and that vector<> MUST be qualified

Norman


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