I've got a function that works in my test document, but when transfered to my finished project I get the error "expected ´)' before ';' token". I've included first the program in its functional test state, as well as the code of the non-functional code, I know the second one is still messy but has been functional so far, and I'm hoping to figure out why the wh
我有一个可以在我的测试文档中工作的函数,但是当转到我完成的项目时,我会在'before'之前得到错误'expected')';' 令牌”。 我已经在程序的功能测试状态,以及非功能代码的代码,我知道第二个仍然凌乱,但功能到目前为止,我希望弄清楚为什么而功能导致错误。 我也很抱歉,代码不是完整的英文,而是丹麦文,我希望这不会完全不可能。 编译器的错误信息: Skarmmedudtest_V_1_1.ino:函数'fl
The title was a little too vague for google. I found myself planning to write this switch statement multiple times so I wanted to move it into a function. What I'm looking to do is create a function that takes a value, what you expect the value to be, and a string identifier for the value. bool checkValue(int value, uint8_t expected, char * id) { switch (value) { case expecte
这个标题对谷歌来说太模糊了。 我发现自己打算多次写这个switch语句,所以我想把它移到一个函数中。 我期望做的是创建一个函数,该函数接受一个值,你期望的值,以及该值的字符串标识符。 bool checkValue(int value, uint8_t expected, char * id) { switch (value) { case expected: return true; case -1: printf("Error: Timeout on %srn", id); default:
I have created the following program which allows a user to guess a word 3 times before ending the program. I'm using a function to read the users input. When I compile the program I get the error 'expected expression before char'. Some feedback would be great thanks! #include <stdio.h> #include <string.h> void get_user_input(char *guess[10]); void get_user_input(cha
我已经创建了以下程序,允许用户在结束程序前猜测一个单词3次。 我正在使用函数来读取用户输入。 当我编译程序时,我得到错误'char之前的预期表达式'。 一些反馈将非常感谢! #include <stdio.h> #include <string.h> void get_user_input(char *guess[10]); void get_user_input(char *guess[10]) { printf("Please guess the word: n"); scanf("%s", guess); } int main(void) { co
When a program calls a function, in which type of data structure is memory allocated for the variables in that function? Heap or stack? why? In my opinion it should store on stack because they are not necessarily reference types. But Where I read the answer, it is stated that they store on heap and free after function returns a value. It is a little more complicated than that and the fact
当一个程序调用一个函数时,哪种类型的数据结构是为该函数中的变量分配的内存? 堆或堆栈? 为什么? 在我看来,它应该存储在堆栈上,因为它们不一定是引用类型。 但是,在我读到答案的地方,它表明它们在堆中存储并在函数返回值后释放。 它比这更复杂一点,堆栈和堆的使用实际上是实现细节。 谈论数据的生命周期更有意义。 短期数据将存储在堆栈(或寄存器)中。 长期存活的数据存储在堆上。 引用类型的实例始终被
I am trying to write a buffer overflow exercise in c for students. Normally the stack frame consists of the function parameters, the return address, the base pointer and local variables. But I detected, that sometimes additional registers are saved along with the base pointer. I remember from class that calee saved registers have to be saved before they are used. But there are cases where th
我正在尝试在c中为学生写一个缓冲区溢出练习。 通常情况下,堆栈帧由函数参数,返回地址,基址指针和局部变量组成。 但是我发现,有时候附加寄存器与基指针一起保存。 我从课上记得,保存的Calee寄存器必须在使用之前保存。 但是有些情况下编译C代码会产生汇编,这会毫无目的地显式地保存和使用寄存器。 请向我解释这种行为。 假定主要功能 int main (int argc, char** argv) { func(); return 0; } 和功能 v
So I'm trying to create a Stack of Strings in C and I seem to be running into an issue. The goal is to read a file, and print it in reverse. I decided a stack would be the most appropriate way to do this (I realize there are easier ways to do this, but I wanted to challenge myself with the use of structures). Here is my push / printStack code: void push(struct LineStack * stack, char * l
所以我试图在C中创建一个字符串堆栈,我似乎遇到了一个问题。 目标是读取文件,并将其反向打印。 我决定一个堆栈是最合适的方式来做到这一点(我意识到有更简单的方法来做到这一点,但我想用自己的结构来挑战自己)。 这是我的push / printStack代码: void push(struct LineStack * stack, char * line) { if(!stack->head) { stack->head = malloc(sizeof(struct entry *)); stack->head
I am writing a basic program to convert an expression given in the infix notation to its postfix notation using a stack. Here is my program. #include<stdio.h> #include<stdlib.h> #include<stdbool.h> #include<string.h> #define MAX_STACK_SIZE 100 //STACK IMPLEMENTATION BEGINS struct stack{ int top; char items[MAX_STACK_SIZE]; }; void push(struct stack* s, char n)
我正在编写一个基本程序,将中缀表示法中的表达式转换为使用堆栈的后缀表示法。 这是我的程序。 #include<stdio.h> #include<stdlib.h> #include<stdbool.h> #include<string.h> #define MAX_STACK_SIZE 100 //STACK IMPLEMENTATION BEGINS struct stack{ int top; char items[MAX_STACK_SIZE]; }; void push(struct stack* s, char n){ if(s->top==MAX_STACK_SIZE-1) print
I'm reading The C Programming Language and learned how to make a reverse Polish calculator using a stack. Here is one of the exercises that follow it: Exercise 4-4. Add the commands to print the top elements of the stack without popping, to duplicate it, and to swap the top two elements. Add a command to clear the stack. What do they mean by "duplicate"? Does it mean to prin
我正在阅读C语言程序设计语言,并学习如何使用堆栈制作逆波兰式计算器。 以下是其中的一个练习: 练习4-4。 添加命令以打印堆栈的顶层元素而不弹出,复制它,并交换顶层的两个元素。 添加一个命令来清除堆栈。 “重复”是什么意思? 这是否意味着打印出整个堆栈,或将整个堆栈推到自身上(例如,“1 2 3”将成为“1 2 3 1 2 3”),或者是什么? 不,不重复堆栈,重复“顶部”条目。 所以如果你的堆栈是: [1,2,3,4,5], 你
Is it possible to wrap the C function alloca into "another"? (only macros of course) Something like: #define my_alloca(size) ({ void *ret = alloca(size); my_function(ret); ret;}) I'm not quite sure about this, does the extension 6.1 Statements and Declarations in Expressions create a new stack frame? (It kinda looks so because of the curly brackets) EDIT: It did some
是否有可能将C函数alloca包装为“另一个”? (当然只有宏) 就像是: #define my_alloca(size) ({ void *ret = alloca(size); my_function(ret); ret;}) 我对此不太确定6.1 Statements and Declarations in Expressions中的扩展6.1 Statements and Declarations in Expressions创建一个新的堆栈框架? (它看起来很像是因为大括号) 编辑: 它做了一些测试: #define printStackFrameAddr(_fnc) printf("%
From my understanding you need opening and closing braces for any 'standard construct in the language' (eg. a for loop/if statement etc. I don't know the real word for it) that contains multiple statements. So, why is this K&R C valid... while((len = getline(line, MAXLINE)) > 0) if(len > max) { max = len; copy(longest, line); } There's no braces on the whi
根据我的理解,对于包含多个语句的任何'语言中的标准构造'(例如for循环/ if语句等,我不知道它的真正单词),需要打开和关闭大括号。 那么,为什么这个K&R C有效...... while((len = getline(line, MAXLINE)) > 0) if(len > max) { max = len; copy(longest, line); } while循环中没有大括号,但它包含多个语句(if为true时)。 这是来自K&R的The C Programming Language第二版中的例子1.9。