Main.cc: In function 'int main()': Main.cc:11:60: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] if (a * a * a = b * b * b + c * c *c + d * d * d && b <= c <= d){ ^ Main.cc:11:20: error: lvalue required as left operand of assignment if (a * a * a = b * b * b + c * c *c + d * d * d && b <= c <= d){ ^ Main.cc:12:27: error: expected primary-expression before ',' token cout<<"Cube = "<