Why do I awlays get WA? Can somebody help?
Posted by
Kolio 5 Jan 2003 15:43
This is my source code:
#include <stdio.h>
#include <math.h>
#include <string.h>
double w1,l1;
double w2,l2;
double x1,x2,x3;
double Y1,Y2,Y3;
const double r = 3437.5;
const double pi = 3.14159265358979323846;
int scan(void)
{
int num, hh, mm, ss;
double x1,x2,x3;
char str[5];
if(scanf("Message #%d.\n", &num) <= 0)
return 0;
scanf("Received at %d:%d:%d.\n", &hh, &mm, &ss);
scanf("Current ship’s coordinates are\n");
scanf("%lf^%lf'%lf\" %s\n", &x1, &x2, &x3, str);
if( str[0] == 'S' )
{
x1=-x1;
x2=-x2;
x3=-x3;
}
w1 = (x1+x2/60+x3/3600)/180*pi;
scanf("and %lf^%lf'%lf\" %s\n", &x1, &x2, &x3, str);
if( str[0] == 'E' )
{
x1=-x1;
x2=-x2;
x3=-x3;
}
l1 = (x1+x2/60+x3/3600)/180*pi;
scanf("An iceberg was noticed at\n");
scanf("%lf^%lf'%lf\" %s\n", &x1, &x2, &x3, str);
if( str[0] == 'S')
{
x1=-x1;
x2=-x2;
x3=-x3;
}
w2 = (x1+x2/60+x3/3600)/180*pi;
scanf("and %lf^%lf'%lf\" %s\n", &x1, &x2, &x3, str);
if( str[0] == 'E')
{
x1=-x1;
x2=-x2;
x3=-x3;
}
l2 = (x1+x2/60+x3/3600)/180*pi;
scanf("===\n");
return 1;
}
void coord(double w, double l, double& a1, double& a2, double& a3)
{
a1 = cos(w)*cos(l);
a2 = cos(w)*sin(l);
a3 = sin(w);
}
double dist2(double a1, double a2, double a3, double b1, double b2,
double b3)
{
return (a1-b1)*(a1-b1)+(a2-b2)*(a2-b2)+(a3-b3)*(a3-b3);
}
double doit(void)
{
coord(w1,l1, x1, x2, x3);
coord(w2,l2, Y1, Y2, Y3);
double res = r * acos (x1*Y1 + x2*Y2 + x3*Y3);
return res;
/*
double x = dist2(x1,x2,x3,Y1,Y2,Y3);
double cosfi = 1-x/2;
double fi = acos(cosfi);
return fi*r;
*/
}
int main(void)
{
#ifndef ONLINE_JUDGE
freopen("1030.in", "r", stdin);
#endif
while(scan())
{
double res = doit();
if ((unsigned)printf("The distance to the iceberg: %
0.2lf miles.\n",res) <
strlen("The distance to the iceberg: 100.00
miles.\n") )
printf("DANGER!\n");
/*
printf("The distance to the iceberg: %.2lf miles.\n",
res);
if(res<99.995)
printf("DANGER!\n");
*/
}
#ifndef ONLINE_JUDGE
fclose(stdin);
#endif
return 0;
}