/in/foo.cc: In function 'int main()':
/in/foo.cc:7:17: error: found ':' in nested-name-specifier, expected '::'
  for(int i=1;a=a:b;i++){
                 ^
/in/foo.cc:7:16: error: 'a' is not a class, namespace, or enumeration
  for(int i=1;a=a:b;i++){
                ^
/in/foo.cc:12:5: error: 'i' was not declared in this scope
  if(i<=100){
     ^
/in/foo.cc:5:10: warning: unused variable 'm' [-Wunused-variable]
  int a,b,m=1,n=1,c=0;
          ^
/in/foo.cc:5:14: warning: unused variable 'n' [-Wunused-variable]
  int a,b,m=1,n=1,c=0;
              ^
/in/foo.cc:18:1: error: expected '}' at end of input
 }
 ^