I need help with this C++ code

Write C++ code to construct the machine code for the LDA FOO instruction and assign it to the variable instruction. The opcode for LDA is 00. unsigned int instruction = 0; Write C++ code to set the above to the value of the machine code for LDA FOO. Base relative mode is not available. As the machine code is 3 bytes, the leading byte of instruction should be 00. Do not write a complete program, just enough code to set the value of INSTRUCTION. You may declare other variables if needed, but you may not call any functions