Main.cc: In function 'int main()': Main.cc:10:19: warning: suggest parentheses around '&&' within '||' [-Wparentheses] if((year%4==0 && year%100!=0 || year%400==0){ ^ Main.cc:10:49: error: expected ')' before '{' token if((year%4==0 && year%100!=0 || year%400==0){ ^