Error when compling C++ files through sandbox

[kanikeabhishek]

/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.6/libstdc++.a when searching for -lstdc++
/usr/bin/ld: cannot find -lstdc++
collect2: ld returned 1 exit status

Can you please tell what is this error...
This error was flagged wen i compiled a c++ file using sandbox that is from onlinejudge plug-in.
Should i need to install any software for that??
I installed gcc,g++,make,c++

[sunner]

It looks like your g++ is not installed properly. Perhaps, you should install some 32-bit c++ libraries