concat.cpp:11: error: 'LGMAXc' was not declared in this scope concat.cpp: In function 'int main()': concat.cpp:22: error: 'C' was not declared in this scope concat.cpp:22: error: 'strlen' was not declared in this scope concat.cpp:23: error: 'bkt' was not declared in this scope concat.cpp: In function 'void bkt(int)': concat.cpp:44: error: 'C' was not declared in this scope concat.cpp:44: error: 'strstr' was not declared in this scope