0_0_1701756_27486.c:1:19: iostream: No such file or directory
0_0_1701756_27486.c:2:16: cmath: No such file or directory
0_0_1701756_27486.c:3: error: syntax error before "namespace"
0_0_1701756_27486.c:13: error: syntax error before "ch"
0_0_1701756_27486.c:15: error: syntax error before "p1"
0_0_1701756_27486.c: In function `multiply':
0_0_1701756_27486.c:17: error: `p1' undeclared (first use in this function)
0_0_1701756_27486.c:17: error: (Each undeclared identifier is reported only once
0_0_1701756_27486.c:17: error: for each function it appears in.)
0_0_1701756_27486.c:17: error: `p0' undeclared (first use in this function)
0_0_1701756_27486.c:17: error: `p2' undeclared (first use in this function)
0_0_1701756_27486.c: At top level:
0_0_1701756_27486.c:20: error: syntax error before "p1"
0_0_1701756_27486.c: In function `distance':
0_0_1701756_27486.c:22: error: `p1' undeclared (first use in this function)
0_0_1701756_27486.c:22: error: `p2' undeclared (first use in this function)
0_0_1701756_27486.c: At top level:
0_0_1701756_27486.c:25: error: syntax error before "PointSet"
0_0_1701756_27486.c: In function `Graham_scan':
0_0_1701756_27486.c:28: error: `Point' undeclared (first use in this function)
0_0_1701756_27486.c:28: error: syntax error before "tmp"
0_0_1701756_27486.c:30: error: `n' undeclared (first use in this function)
0_0_1701756_27486.c:31: error: `PointSet' undeclared (first use in this function)
0_0_1701756_27486.c:33: error: `tmp' undeclared (first use in this function)
0_0_1701756_27486.c: In function `main':
0_0_1701756_27486.c:64: error: `cin' undeclared (first use in this function)
0_0_1701756_27486.c:67: error: `Point' undeclared (first use in this function)
0_0_1701756_27486.c:67: error: syntax error before "s"
0_0_1701756_27486.c:73: error: `s' undeclared (first use in this function)
0_0_1701756_27486.c:79: error: `cout' undeclared (first use in this function)
0_0_1701756_27486.c:79: error: `endl' undeclared (first use in this function)
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