Main.cc: In function 'int main()':
Main.cc:6:14: error: expected ';' before ')' token
for(int i)
^
Main.cc:6:14: error: expected primary-expression before ')' token
Main.cc:6:14: error: expected ';' before ')' token
Main.cc:6:13: warning: unused variable 'i' [-Wunused-variable]
for(int i)
^
Main.cc:4:11: warning: unused variable 'sum' [-Wunused-variable]
int n,sum=0,a;
^
Main.cc:4:17: warning: unused variable 'a' [-Wunused-variable]
int n,sum=0,a;
^