/in/foo.cc: In function 'int main()':
/in/foo.cc:6:6: warning: statement has no effect [-Wunused-value]
    20%a;
    ~~^~
/in/foo.cc:7:6: warning: statement has no effect [-Wunused-value]
    30%b;
    ~~^~
/in/foo.cc:8:6: warning: statement has no effect [-Wunused-value]
    50%c;
    ~~^~
/in/foo.cc:9:12: warning: suggest parentheses around comparison in operand of '==' [-Wparentheses]
    a+b+c==d<=100
           ~^~~~~
/in/foo.cc:10:4: error: expected ';' before 'cout'
    cout<"d"<edll;
    ^~~~
/in/foo.cc:9:9: warning: statement has no effect [-Wunused-value]
    a+b+c==d<=100
    ~~~~~^~~~~~~~
/in/foo.cc:12:1: error: expected ';' before '}' token
 }
 ^