5. 游戏时间2

Acwing 668.游戏时间2

#include
#includeusing namespace std;int main()
{int a,b,c,d,x,y;cin>> a>>b>>c>>d;if (a x = (c*60+d-a*60-b)/60;y = (c*60+d-a*60-b)%60;}else if(a==c){if(b>d){x = ((24+c)*60+d-a*60-b)/60;y = ((24+c)*60+d-a*60-b)%60;}else if(b==d){x = 24;y = 0;}else if(bx = 0;y = d-b;}}else {x = ((24+c)*60+d-a*60-b)/60;y = ((24+c)*60+d-a*60-b)%60;}printf("O JOGO DUROU %d HORA(S) E %d MINUTO(S)",x,y);return 0;
}

6. 税

Acwing 672.税

#include
#includeusing namespace std;int main()
{double salary,x,tax;cin >> salary;if(salary>=0.00&&salary<=2000.00){printf("Isento");}else if(salary>=2000.01&&salary<=3000.00){x = (salary-2000)*0.08;printf("R$ %.2lf",x);}else if(salary>=3000.01&&salary<=4500.00){x = 1000*0.08+(salary-3000)*0.18;printf("R$ %.2lf",x);}else if(salary>4500.00){x = 1000*0.08+1500*0.18+(salary-4500)*0.28;printf("R$ %.2lf",x);}return 0;
}

7. 简单排序

Acwing 663.简单排序

#include
#includeusing namespace std;int main()
{int a,b,c;cin >> a >> b >> c;int x = a,y = b,z = c;if(a > b){int t = a;a = b;b = t;}if(c < a){int t = a;a = c;c = t;}if(c < b){int t = b;b = c;c = t;} cout << a << endl << b << endl << c << endl << endl;cout << x << endl << y << endl << z << endl;return 0;
}

8. 一元二次方程式

Acwing 658.一元二次方程式

#include
#include
#include
using namespace std;int main()
{double a,b,c,x1,x2;cin >> a>>b>>c;if((b*b-4*a*c)<0||a == 0){printf("Impossivel calcular");}else {double m = sqrt(b*b-4*a*c);x1=(-b+m)/(2*a);x2=(-b-m)/(2*a);printf("R1 = %.5lf\n",x1);printf("R2 = %.5lf\n",x2);}
}

9. 平均数3

Acwing 661.平均数3

#include
#include
using namespace std;int main()
{double n1,n2,n3,n4;scanf("%lf%lf%lf%lf",&n1,&n2,&n3,&n4);double x = (2*n1+3*n2+4*n3+n4)/10;printf("Media: %.1lf",x);if(x >= 7) cout<<"Aluno aprovado."<= 5&&x < 7){cout<<"Aluno em exame."<> y;printf("Nota do exame: %.1lf",y);z = (x+y)/2;if (z>=5)printf("Aluno aprovado.\n");else printf("Aluno reprovado.\n");printf("Media final: %.1lf\n",z);}
}