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...
isub ; Subtract 65 (A) from 67 (C). Push 32-bit result onto stack.The bi in bipush stands for the byte integer type; the i in istore_1, iload_1, and isub stands for the 32-bit integer type. The compiler has converted the expression into an int value. It makes sense to do ...
isub ; Subtract 65 (A) from 67 (C). Push 32-bit result onto stack.The bi in bipush stands for the byte integer type; the i in istore_1, iload_1, and isub stands for the 32-bit integer type. The compiler has converted the expression into an int value. It makes sense to do ...