Main.cc: In function ‘int main()’:
Main.cc:6:30: error: expected ‘;’ before ‘)’ token
for(!(a%x==b%x&&b%x==c%x)){
^
Main.cc:6:9: warning: statement has no effect [-Wunused-value]
for(!(a%x==b%x&&b%x==c%x)){
^~~~~~~~~~~~~~~~~~~~~
Main.cc:10:5: error: expected primary-expression before ‘return’
return 0;
^~~~~~
Main.cc:10:5: error: expected ‘)’ before ‘return’