P148P154①將程序中的“s=1.0/2*(a+b+c；”語句改為“s=1/2*(a+b+c);”，再進(jìn)行編譯、、c));ify==2.2)”改為“iffabs(y-2.2)<1e-6)”，然后運(yùn)行程序，查看結(jié)果，#include<iostream>#include<cmath>usingnamespacestd;intmain(){floatx,y;if(fabs(y-2.2)<1e-cout<<"x==y"<<endl;if(x=y)cout這是一個(gè)邏輯錯(cuò)誤！endl;return0;}if(x=y)”到底要表達(dá)何意？請(qǐng)改成正確的形式。修改后的程序#include<iostream>#include<cmath>usingnamespacestd;intmain(){floatx,y;if(fabs(y-2.2)<1e-6)cout<<"x==y"<<endl;if(x==y)coutendl;return0;}#include<iostream>#include<cmath>usingnamespacestd;intmain(){floatcin>>a>>b>>c;if(fabs(a)<1e-6)cout<<"isnotquadratic"<<{if(fabs(d)<=1e- {cout<<"hastwoequalroots:\n";cout<<"x1=x2="<<x1<<}elseif(d>1e- {x1=(-cout<<"hastworealroots:\n"cout<<"x1="<<x1<<",x2="<<x2<<} {cout<<"hastwocomplexroots:cout<<"x1="<<lp<<"+"<<ip<<"i\n";cout<<"x2="<<lp<<"-"<<ip<<}}return}1位小數(shù)。#include<iostream>#include<cmath>#include<iomanip>usingnamespacestd;int{floatcin>>a>>b>>c;cout<<setprecision(1);if(fabs(a)<1e-cout<<"isnotquadratic"<<{iffabs(d)<=1e- //{cout<<"hastwoequalroots:\n";cout<<"x1=x2="<<x1<<}elseif(d>1e- //{x1=(-cout<<"hastworealroots:\n"cout<<"x1="<<x1<<",x2="<<x2<<} //{cout<<"hastwocomplexroots:cout<<"x1="<<lp<<"+"<<ip<<"i\n";cout<<"x2="<<lp<<"-"<<ip<<"i\n";}}return}switchdefaultdefaultcasebreak正確嗎？請(qǐng)解釋。caseswitch語句，有沒有40,000s，編寫程序，將其轉(zhuǎn)換成幾小時(shí)幾分#include<iostream>usingnamespacestd;intmain(){inta=40000,b,c;a=(a-cout<<"40000秒是"<<a<<"小時(shí)"<<c<<"分鐘"<<b<<"秒";return0;}#include<iostream>usingnamespacestd;intmain(){intif((a+b)>c&&(a+c)>b&&(b+c)>a{if(a*a+b*b==c*c||a*a+c*c==b*b||b*b+c*c==a*a)elseif(a==b&&elseif(a==b||a==c||b==c)}return0;}}rh（#include<iostream>usingnamespacestd;intmain(){ return}24688642。#include<iostream>usingnamespacestd;intmain(){int elseif(c==00&&d==0&&e==0&&f==0)elseif(d==0&&e==0&&f==0)elseif(e==0&&f==0)elseif(f==0){case(2):cout<<a<<""<<b;break;case(3):cout<<a<<""<<b<<""<<c;break;case(4):cout<<a<<""<<b<<""<<c<<""<<d;break;case(5):cout<<a<<""<<b<<""<<c<<""<<d<<""<<e;break;case(6):cout<<a<<""<<b<<""<<c<<""<<d<<""<<e<<""<<f;break;}return0;}4a成為最大值，d4個(gè)數(shù)。#include<iostream>usingnamespacestd;intmain(){inta,b,c,d,k,l,i,j;intm