自动出题100以内的加减法混合运算，给那些要给孩子出题的家长提供方便，快捷键为Ctrl+L-Auto title addition and subtraction within 100 mixed operations, to those who give the child a question for the convenience of parents, the shortcut is Ctrl+ L

这是一个入门级VC＋＋源码，代源码的作用是求100以内偶数之和-This is an entry-level VC source code, source code on behalf of the role is to strive for even less than 100, and the