Write a C++ program that uses a single stack that will readpostfix expressions and prints their values. Each input expressionwill be on its own line as shown in the postfix.txt file. Theoutput of each expression should be displayed on the console screenin an attractive manner. The program should terminate when the endof the file is reached.   Assume only binary operators and that the expression contain novariables. Note that you will need to use parentheses to indicatethe order of application of the operators in the expression. Forexample: Use the postfix.txt file to test your program. Be sure to set yourprogram to read from this file. The contents of postfix.txt: 78 78 6 + 78 6 + 9 2 – / . . .