Functions and Program Structure

• 4.1 strindex which returns rightmost occurance
• 4.2 Extend atof to handle scientific notation
• 4.3 RPN modulus operator and negative numbers
• 4.4 RPN Calculator - print two top elements of the stack without popping
• 4.5 RPN Calculator with mathematical functions
• 4.6 RPN Calculator with variables
• 4.7 Function ungets that will push back an entire string onto the input
• 4.8 getch and ungetch handling pushback character
• 4.9 getch and ungetch handling EOF Character
• 4.10 Calculator using getline
• 4.11 getline using static
• 4.12 convert integer into string by calling recursive routine
• 4.13 reverse the string s
• 4.14 swap that interchanges two arguments of type t