tutorial4.cpp: In function 'int solve()':
tutorial4.cpp:6:7: error: redeclaration of 'int b'
tutorial4.cpp:5:9: error: 'int b' previously declared here
tutorial4.cpp:6:14: error: 'f' was not declared in this scope
tutorial4.cpp:7:7: error: redeclaration of 'int a'
tutorial4.cpp:5:7: error: 'int a' previously declared here
tutorial4.cpp:9:15: error: 'Report' was not declared in this scope
tutorial4.cpp:5:7: warning: unused variable 'a' [-Wunused-variable]
tutorial4.cpp:10:1: warning: no return statement in function returning non-void [-Wreturn-type]