need help with c++

Develop a complete C++ program to perform arithmetic operations. You must include a function named calc() which accepts an arithmetic operator (+ -/) and two operands as input parameters. Function calc() should return the answer of applying the operator to the operands using reference parameter. For example, with variable declarations float a, b, ans; the function can be called by using calca, "*"b, ans) to calculate the expression a multiplied by b and the result is stored in ans. This program will prompt the user to input two float values, and then calls functions calco four times to return the addition, subtraction, multiplication and division of the two input values. Sample output Enter two? Adon Stan Maan