自增自减

int b=8;

int c=0;

c=++b;

cout<<"c="<<c<<endl;

cout<<"b="<<b<<endl;

结果为：c=9；b=9；

int b=8;

int c=0;

c=b++;

cout<<"c="<<c<<endl;

cout<<"b="<<b<<endl;

结果为：c=8；b=9；

int b=8;

int c=0;

c=--b;

cout<<"c="<<c<<endl;

cout<<"b="<<b<<endl;

结果为：c=7；b=7；

int b=8;

int c=0;

c=b--;

cout<<"c="<<c<<endl;

cout<<"b="<<b<<endl;

结果为：c=8；b=7；