/in/foo.cc: In function 'int main()':
/in/foo.cc:42:14: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
              ^
/in/foo.cc:44:25: error: 'strlen' was not declared in this scope
     if (text[strlen(text) - 1] == '\n') {
                         ^
/in/foo.cc:48:14: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
              ^
/in/foo.cc:50:31: error: 'strlen' was not declared in this scope
     if (keyword[strlen(keyword) - 1] == '\n') {
                               ^