算法笔记codeup-Contest100000566

ABCD太直接了就不放了

E 求一元二次方根 C语言

 1 #include <stdio.h>
 2 #include <math.h>
 3 int main()
 4 {
 5 double a=0;
 6 double b=0;
 7 double c=0;
 8 scanf("%lf%lf%lf",&a,&b,&c);
 9 double r1=(-b+sqrt(b*b-4*a*c))/(2*a);
10 double r2=(-b-sqrt(b*b-4*a*c))/(2*a);
11 printf("r1=%7.2f
",r1);
12 printf("r2=%7.2f",r2);
13 return 0;
14 }

F 字符输入输出 C++

 1 #include <iostream>
 2 #include <string>
 3 using namespace std;
 4 int main()
 5 {
 6     string boy;
 7     cin>>boy;
 8     cout<<boy;
 9     
10 }

When you return with glory, you will be bathed in the golden rain.