0_0_6565316_31978.cpp:6: error: expected `,' or `;' before "double"
0_0_6565316_31978.cpp: In function `double cal_cd(point, point, point)':
0_0_6565316_31978.cpp:32: error: `r' undeclared (first use this function)
0_0_6565316_31978.cpp:32: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6565316_31978.cpp:32: error: `q' undeclared (first use this function)
0_0_6565316_31978.cpp: In function `double cal_ab(point, point, point, point)':
0_0_6565316_31978.cpp:60: error: `p' undeclared (first use this function)
0_0_6565316_31978.cpp: In function `int main()':
0_0_6565316_31978.cpp:85: error: `p' undeclared (first use this function)
0_0_6565316_31978.cpp:85: error: `q' undeclared (first use this function)
0_0_6565316_31978.cpp:85: error: `r' undeclared (first use this function)
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