/in/foo.cc: In function 'int main()':
/in/foo.cc:22:31: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    else if (strcmp(b,"&lt")==0&& strcmp(c, "&gt") == 0|| strcmp(b, "&gt") == 0 && strcmp(c, "&lt") == 0 )      
                               ^