foo.cc: In function 'int main()':
foo.cc:8:5: error: expected ';' before 'if'
     if (c>a||c==a)
     ^~
foo.cc:12:5: error: 'else' without a previous 'if'
     else if (c<a&&c>b)
     ^~~~

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。