Compiler output
prog.cpp: In function 'int main()':
prog.cpp:6:5: error: 'fre' was not declared in this scope
prog.cpp:9:5: error: expected ';' before 'int'
prog.cpp:15:9: error: 'first' was not declared in this scope
prog.cpp:16:9: error: 'r' was not declared in this scope
prog.cpp:17:25: error: 'n' was not declared in this scope
prog.cpp:17:28: error: 'c1' was not declared in this scope
prog.cpp:17:32: error: 'c2' was not declared in this scope
prog.cpp:37:13: error: 'i' was not declared in this scope
