0_0_13469096_23363.cpp:1:10: error: #include expects "FILENAME" or <FILENAME>
#include
^
0_0_13469096_23363.cpp:2:10: error: #include expects "FILENAME" or <FILENAME>
#include
^
0_0_13469096_23363.cpp:3:10: error: #include expects "FILENAME" or <FILENAME>
#include
^
0_0_13469096_23363.cpp:4:10: error: #include expects "FILENAME" or <FILENAME>
#include
^
0_0_13469096_23363.cpp:9:28: error: 'acos' was not declared in this scope
const double pi = acos(-1.0);
^
0_0_13469096_23363.cpp: In function 'double dis(const PPoint&, const PPoint&)':
0_0_13469096_23363.cpp:58:25: error: 'sqrt' was not declared in this scope
return sqrt(dis2(p0,p1));
^
0_0_13469096_23363.cpp: In function 'int convex_hull(PPoint*, int, PPoint*)':
0_0_13469096_23363.cpp:78:53: error: 'printf' was not declared in this scope
printf("wrong answer ,cause of n smaller than 3\n");
^
0_0_13469096_23363.cpp:86:18: error: 'swap' was not declared in this scope
swap(a[i],a[0]);
^
0_0_13469096_23363.cpp:91:28: error: 'sort' was not declared in this scope
sort(a,a+n,convex_hull_cmp);//����
^
0_0_13469096_23363.cpp: In function 'int main()':
0_0_13469096_23363.cpp:114:15: error: 'scanf' was not declared in this scope
scanf("%d",&t);
^
0_0_13469096_23363.cpp:138:23: error: 'printf' was not declared in this scope
printf("%.0lf\n",ans);
^
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