A
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 if((b*b-4*a*c)>=0)
10 {
11 double r1=(-b+sqrt(b*b-4*a*c))/(2*a);
12 double r2=(-b-sqrt(b*b-4*a*c))/(2*a);
13 printf("r1=%7.2f
",r1);
14 printf("r2=%7.2f",r2);
15 }
16 else{
17 printf("No real roots!");
18 }
19
20 return 0;
21 }
B
1 #include <stdio.h>
2 int main()
3 {
4 float a=0;
5 float b=0;
6 scanf("%f%f",&a,&b);
7 if(a<b)
8 {
9 printf("%.2f %.2f",a,b);
10 }
11 else
12 {
13 printf("%.2f %.2f",b,a);
14 }
15 return 0;
16 }
C
1 #include <stdio.h>
2 int main()
3 {
4 float a=0;
5 float b=0;
6 float c=0;
7 float tem=0;
8 scanf("%f%f%f",&a,&b,&c);
9 if(b<a)
10 {
11 tem=a;
12 a=b;
13 b=tem;
14 }
15 if(c<a)
16 {
17 tem=a;
18 a=c;
19 c=tem;
20 }
21 if(c<b)
22 {
23 tem=b;
24 b=c;
25 c=tem;
26 }
27 printf("%.2f %.2f %.2f",a,b,c);
28 return 0;
29 }
D
1 #include <stdio.h>
2 int main()
3 {
4 int a=0;
5 int b=0;
6 int c=0;
7 int tmp=0;
8 scanf("%d%d%d",&a,&b,&c);
9 if(a>c)
10 {
11 tmp=a;
12 a=c;
13 c=tmp;
14 }
15 if(b>c)
16 {
17 tmp=b;
18 b=c;
19 c=tmp;
20 }
21 printf("%d",c);
22 }
E
1 #include <stdio.h>
2
3 int main()
4 {
5 double money=0;
6 double praise=0;
7 scanf("%lf",&money);
8 if(money<=100000)
9 {
10 praise=money*0.1;
11 }
12 else if(money<=200000)
13 {
14 praise=100000*0.1+(money-100000)*0.075;
15 }
16 else if(money<=400000)
17 {
18 praise=100000*0.1+100000*0.075+(money-200000)*0.05;
19 }
20 else if(money<=600000)
21 {
22 praise=100000*0.1+100000*0.075+200000*0.05+(money-400000)*0.03;
23 }
24 else if(money<=1000000)
25 {
26 praise=100000*0.1+100000*0.075+200000*0.05+200000*0.03+(money-600000)*0.015;
27 }
28 else
29 {
30 praise=100000*0.1+100000*0.075+200000*0.05+200000*0.03+400000*0.015+(money-1000000)*0.01;
31 }
32 printf("%.2lf",praise);
33 }