0_0_17885150_6185.cpp: In function 'int main()': 0_0_17885150_6185.cpp:10:9: error: expected primary-expression before 'double' ans = (double 4 / 3) * PI * r * r * r; ^ 0_0_17885150_6185.cpp:10:9: error: expected ')' before 'double'