/in/foo.c: In function 'main':
/in/foo.c:19:12: error: expected expression before ':' token
     printf(: %d\n", sum);
            ^
/in/foo.c:19:16: error: stray '\' in program
     printf(: %d\n", sum);
                ^
/in/foo.c:19:18: warning: missing terminating " character
     printf(: %d\n", sum);
                  ^
/in/foo.c:19:18: error: missing terminating " character
     printf(: %d\n", sum);
                  ^~~~~~~~
/in/foo.c:22:1: error: expected ';' before '}' token
 }
 ^