View Compilation Error

590086_0_0_24722.cpp: In function `int main()':
590086_0_0_24722.cpp:24: error: `j' undeclared (first use this function)
590086_0_0_24722.cpp:24: error: (Each undeclared identifier is reported only once for each function it appears in.)
590086_0_0_24722.cpp:24: error: `f' undeclared (first use this function)
590086_0_0_24722.cpp:26: error: invalid operands of types `Trade[100]' and `double' to binary `operator+'