I doubt that's your actual code:
- your code doesn't compile: missing cv and std namespace qualifiers
- ¿shouldn't the message be «Error : Image cannot be loaded..!!»?
to void stupid filename typos use the tab-complete features of your shell to pass arguments into `argv' (same can be done with rlwrap and std::cin)
PS: your opencv version seems to be ancient: those macros are no more, were replaced by constants inside the namespace