/in/foo.cc:3:12: warning: missing terminating " character
     printf("Hello,world!
            ^
/in/foo.cc:3:12: error: missing terminating " character
     printf("Hello,world!
            ^~~~~~~~~~~~~
/in/foo.cc:4:1: warning: missing terminating " character
 ");
 ^
/in/foo.cc:4:1: error: missing terminating " character
 ");
 ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:5:5: error: expected primary-expression before 'return'
     return 0;
     ^~~~~~