bacan.cpp: In function `int main()': bacan.cpp:9: `n' undeclared (first use this function) bacan.cpp:9: (Each undeclared identifier is reported only once for each function it appears in.) bacan.cpp:10: `i' undeclared (first use this function) bacan.cpp:11: `a' undeclared (first use this function) bacan.cpp:12: ISO C++ forbids an empty condition for `while'