# include <stdio.h>int main(void) {//保存三个系数于计算机中int a=1;int b=2;int c=2;float x1;float x2;float delta;//delta=b*b-4acdelta=b*b-4*a*c;if(delta>0) {x1=(-b+delta)/2*a;x2=(-b-delta)/2*a;printf("该

1. 问题Latex中直接使用下划线_，因与系统默认功能相冲突，会报错或者损失信息。2.方法原始符号修改后_\_

在看Spring Security开源项目的Userdatils实现类里发现了这个代码@Override@JsonIgnorepublic Collection<? extends GrantedAuthority> getAuthorities() {List<SimpleGrantedAuthority> authorities = new ArrayList<&

#include <iostream>#include <cassert>using namespace std;class Point {public://外部接口Point() :x(0), y(0) {cout << "Default Constructor called"<<endl;}Point(int x ,int y) : x(x),