prog.cpp: In function ‘int main(int, char**)’:
prog.cpp:8: warning: statement has no effect
prog.cpp:11: warning: statement has no effect
prog.cpp:14: warning: statement has no effect
prog.cpp:17: error: invalid operands of types ‘char*’ and ‘char*’ to binary ‘operator+’
prog.cpp:19: error: expected primary-expression before ‘...’ token
prog.cpp:19: error: ‘function_A’ was not declared in this scope
prog.cpp:23: warning: statement has no effect
prog.cpp:26: warning: statement has no effect
prog.cpp:30: error: expected primary-expression before ‘...’ token
prog.cpp:30: error: ‘function_B’ was not declared in this scope
prog.cpp:4: warning: unused variable ‘a’
prog.cpp:4: warning: unused variable ‘b’
prog.cpp:4: warning: unused variable ‘c’
prog.cpp:4: warning: unused variable ‘d’
prog.cpp:4: warning: unused variable ‘e’