579 - Clock Hands

[mystical_liu]

this is my code !!!
is there anybody can tell me where am i wrong!!!

[cpp]#include<stdio.h>
main()
{
int h,m,hn,mn;
float ans;
while(scanf(" %d:%d",&h,&m)==2)
{
if(!h&&!m)break;
ans=((h*60)*0.5)+(m*0.5)-(m*6);
if(ans>180)ans=360.000-ans;
else if(ans<0)ans*=-1;
printf("%.3f\n",ans);
}
}[/cpp]

[Revenger]

For example, on the test

Code: Select all

1:59

the corect output is

Code: Select all

65.500

Change your code is so way:

[cpp]if(ans<0)ans*=-1;
if(ans>180)ans=360.000-ans;[/cpp]
[/code]

[mystical_liu]

OH!!!
I got it !!!!!
thinks a lot!!~!~
I know where am I wrong!!
thinks your remide!!!

[Morning]

[cpp]
#include<stdio.h>
void main()
{
float clock,minute;
float degree;
while(scanf("%f:%f",&clock,&minute)==2)
{
if(!clock&&!minute) break;
degree=(clock*30+minute/2)-minute*6;
while(degree<0)
{
degree+=180;
}
while(degree>=180)
{
degree=360-degree;
}
printf("%.3f\n",degree);
}
}
[/cpp]

[Tanzim-Saqib]

I don't understand why these while loops (except for taking inputs) are necessary. Morning, just derive an equation where there will only be minutes and hour and nothing else, no more loops. Hope it helps.

[Morning]

thanx,i've gotten it:)

[cytmike]

[cpp]#include <iostream>
#include <iomanip>

using namespace std;

int main()
{
int p,h;
char y;
cin>>p>>y>>h;
while ((p!=0)&&(y!=0))
{
long double l=abs(p*30-h*5.5);
if (l>180)
l=360-l;
cout<<setiosflags(ios::showpoint|ios::fixed)<<setprecision(3)<<l<<endl;
cin>>p>>y>>h;
}
return 0;
}

[/cpp]

What happened!!??

[UFP2161]

[c]1:01[/c]
should output
[c]24.500[/c]

[cytmike]

my program outputs 24.500 too...

[UFP2161]

Ah, I think I see the problem.

When I originally compiled your program I got the following warning:

g++ test.cpp
test.cpp: In function `int main()':
test.cpp:13: warning: `double' used for argument 1 of `abs(int)'

However, when I #include <cmath>, it works as expected.

The judge is probably doing the same thing. There are overloaded abs() operators in the <cmath> header file, but the default std::abs only takes and returns an int, which is probably causing your WA.

[cytmike]

but why i can compile it correctly, but the judge cannot???

[UFP2161]

In your environment, your compiler might auto-include <cmath> which has the overloaded operators, but the judge's system, as well as most standard UNIX systems, will not.

[cytmike]

ic
thank you very much

[efr_shovo]

/* Why 579 Gives Wrong Ans Please Help*/

#include<stdio.h>
#include<ctype.h>

char time1[4];

int hour,minute,mutex,ex;
float deg;

int Digit(int *d)
{
int digit;
int g=*d;
int b10=0;
while(isdigit(time1[g]))
{
b10*=10;
digit=(int(time1[*d])-48)+b10;
b10=digit;
g++;
*d=g;
}
return digit;
}

void main()
{

while(1)
{ int i=0;
scanf("%s",time1);

for(i=0;i<4;i++)
{
if(!mutex)
{
if(isdigit(time1))
{
hour=Digit(&i);
mutex=1;
}
}
else
{
minute=Digit(&i);
mutex=0;
}
}

if(!hour && !minute)
break;
if(hour>12)
hour=0;
else
hour=12-hour;

deg=float((hour*30)+(minute*6+minute/60)-(.5*float(minute)));
if(deg<0)
deg*=-1;
if(deg>180.0)
{
deg=float(360)-deg;
deg*=-1;

}
printf("%.3f\n",deg);
}
}

[Ghust_omega]

Hi!! efr_shovo try with this I/O

Input:

Code: Select all

0:46
11:55
1:55
12:12
1:00
2:00
0:19
12:46
9:00
10:16
7:00
3:00
3:50
2:43
10:55
9:42
1:18
5:27
10:16
9:22
1:33
3:59
4:37
5:44
4:30
1:46
0:20
2:33
11:50
6:00
10:45
10:27
1:00
4:00
11:17
12:15
0:45
3:27
9:44
7:50
00:00

ouput:

Code: Select all

107.000
27.500
87.500
66.000
30.000
60.000
104.500
107.000
90.000
148.000
150.000
90.000
175.000
176.500
2.500
39.000
69.000
1.500
148.000
149.000
151.500
125.500
83.500
92.000
45.000
137.000
110.000
121.500
55.000
180.000
52.500
151.500
30.000
120.000
123.500
82.500
112.500
58.500
28.000
65.000

Hope its helps
Keep posting!!