Main.cc: In function 'int main()': Main.cc:6:16: error: lvalue required as left operand of assignment if(a%3==0&&a%5=0){ ^ Main.cc:10:7: error: expected ';' before string constant cout"cannot"<endl; ^ Main.cc:10:21: warning: statement has no effect [-Wunused-value] cout"cannot"<<endl; ^ Main.cc:4:8: warning: unused variable 'n' [-Wunused-variable] int a,n; ^