stack

问题 A simple example that demonstrates my issue: // test.c #include <stdio.h> int foo1(int i) { i = i * 2; return i; } void foo2(int i) { printf("greetings from foo! i = %i", i); } int main() { int i = 7; foo1(i); foo2(i); return 0; } $ clang -o test -O0 -Wall -g test.c Inside GDB I do the following and start the execution: (gdb) b foo1 (gdb) b foo2 After reaching the first breakpoint, I disassemble: (gdb) disassemble Dump of assembler code for function foo1: 0x0000000000400530 <+0>: push %rbp

问题 I have two stacks, one with operands, the other with operators. My problem is turning these two stacks into a binary tree. For example, the expression (2+3)*(4-3) will be translated into postfix ( such that 24+43-* ) and then put into two stacks 3442 and *-+ will be the stacks (with the tops being 3 and * respectively). Now with these stacks, i need to form a binary tree like * + - 2 3 4 3 Is there a way to do this recursively? Right now, I have an algorithm like so: Create the root of the

问题 Basically, I have 2 files ( .adb and .ads). I am totally new to Ada and also how to compile 2 files. The program is of a basic stack implementation. I got this compile error when I compiled the .adb file. $ gcc -c test_adt_stack.adb abstract_char_stack.ads:22:01: end of file expected, file can have only one compilation unit The 2 files I have are: abstract_char_stack.ads ----------------------------------------------------------- package Abstract_Char_Stack is type Stack_Type is private;

问题 I have read plenty of questions on here, which explain what the stack and heap are e.g. this one: What and where are the stack and heap?, which was very helpful. I understand that high level languages are compiled into an intermediary language e.g. byte code for Java and MSIL for .NET programs. MSIL and byte code is then compiled into machine code. My understanding was that intermediary languages use the stack and heap and then the program is compiled into machine code, which is platform

问题 As we know, local variables is located on stack. However, what is their order? Are they arranged as the order of their declaration? This means that the first declared variable is arrange on the higher address of stack (stack grows to lower address) ? As an example: void foo(){ int iArray[4]; int iVar; } On stack, the local variable-- iArray and iVar are arranged as followed? 回答1: The simplest implementations make it very easy to predict where various variables will end up on the stack.

问题 Still doing my F# performance testing and trying to get stack based arrays working. For some more background see here: f# NativePtr.stackalloc in Struct Constructor. As I understand it, each function call should get its own frame in the stack. This memory is then freed upon return by moving the stack pointer back. However the below causes a stack overflow error - not sure why as the stackalloc is performed inside a function. Interestingly this only happens in Release mode, not Debug mode. I

问题 I have found more than one occasions where a generic collection needs to be treated as a list at one point in time and as a stack or queue at another time. For an an application I'm currently developing, it does not make sense to use three separate objects. The simplest solution I could think of was to implement Queue/Dequeue/Push/Pop/Peek functions on the standard List. Also (not included in the code below), an interface constraint is applied on T allowing the class to maintains a position

问题 I m trying to understand sorting a stack elements using recursion given in http://www.geeksforgeeks.org/sort-a-stack-using-recursion/ Use of any loop constructs like while, for..etc is not allowed. We can only use the following ADT functions on Stack S: is_empty(S) : Tests whether stack is empty or not. push(S) : Adds new element to the stack. pop(S) : Removes top element from the stack. top(S) : Returns value of the top element. Note that this function does not remove element from the stack.

问题 After some google search I find it! Prefix to Infix This algorithm is a non-tail recursive method. The reversed input string is completely pushed into a stack. prefixToInfix(stack) 1) IF stack is not empty a. Temp -->pop the stack b. IF temp is a operator i. Write a opening parenthesis to output ii. prefixToInfix(stack) iii. Write temp to output iv. prefixToInfix(stack) v. Write a closing parenthesis to output c. ELSE IF temp is a space -->prefixToInfix(stack) d. ELSE i. Write temp to output

问题 Has anybody used MongoDB's Array type to implement a stack? I know that I can append to an Array like so: db.blogposts.update( {_id:5}, {$push: {comments: {by: "Abe", text:"First"}}}) Here, the end of the array is the top of the stack... I don't see a way to implement this with the top of the stack at the zero'th index, but I'd love to be wrong. And I know that I can peek at the last value of the the array like so: db.blogposts.find( {_id:5}, {comments: {$slice:-1}}) With an implementation