Main.cc: In function ‘int main()’:
Main.cc:14:20: warning: init-statement in selection statements only available with -std=c++1z or -std=gnu++1z
if(j%m==0;){
^
Main.cc:14:23: warning: statement has no effect [-Wunused-value]
if(j%m==0;){
~~~^~~
Main.cc:14:27: error: expected primary-expression before ‘)’ token
if(j%m==0;){
^