Main.cc:1:1: error: 'include' does not name a type
include
^
Main.cc: In function 'int main()':
Main.cc:6:14: error: 'scanf' was not declared in this scope
scanf("%d",&n);
^
Main.cc:15:22: error: 'printf' was not declared in this scope
printf("%d\n",sum);
^
Main.cc:5:7: warning: unused variable 'b' [-Wunused-variable]
int a,b,n,sum=0,m;
^