x=stack[top--]; y=stack[top];if(expr[i]=='+') stack[top]=y+x;elsestack[top]=y-x; }elsereturnInfinity; } }elseif(expr[i]=='*'||expr[i]=='/') {if(top) { x=stack[top--]; y=stack[top];if(expr[i]=='*') stack[top]=y*x;else{if(x) stack[top]=y/x;elseretur...
6-5 Evaluate Postfix Expression (25分) Write a program to evaluate a postfix expression. You only have to handle four kinds of operators: +, -, x, and /. ElementTypeEvalPostfix(char*expr ); whereexprpoints to a string that stores the postfix expression. It is guaranteed that there is e...
Acompound expressionconsists of one or more simple expressions integrated into a larger expression via anoperator, which is a sequence of instructions symbolically represented in source code. The operator transforms its expressionoperand(s)into another value. For example, in6 * 5, the multiplication ...
Loop through all Postfix tokens If token is a numeric, then add to a stack If token is an operator, then pop two numerics from the stack and evaluate Push the evaluated value back into the stack If more than one value exists in the stack, our RPN expression is incorrect and return so...
ElementType EvalPostfix( char *expr ); 1. whereexprpoints to a string that stores the postfix expression. It is guaranteed that there is exactly one space between any two operators or operands. The functionEvalPostfixis supposed to return the value of the expression. If it is not a legal ...
However, if I replaced 'C' - 'A' with 'C' - base, where base is a char variable initialized to 'A', the compiler would generate the following bytecode:bipush 65 ; Push 8-bit Unicode value for A, which is sign-extended to 32-bit int, onto stack. istore_1 ; Pop this 32-bit...