Main.cc: In function 'int main()':
Main.cc:6:2: error: expected ';' before 'for'
for(m;m<=n;m=m+m){
^
Main.cc:6:9: warning: statement has no effect [-Wunused-value]
for(m;m<=n;m=m+m){
^
Main.cc:6:18: error: expected ';' before ')' token
for(m;m<=n;m=m+m){
^