define什么意思 define 定义一个标识符来表示一个常量。其特点是定义的标识符不占内存，只是一个临时的符号，预编译后这个符号就不存在了。用 #define 定义标识符的一般形式为：define 标识符 常量 //注意, 最后没有分号 define 和 #include 一样，也是以“#”开头的。
Use one function to call another function: // Declare two functions, myFunction and myOtherFunctionvoid myFunction();void myOtherFunction();int main() { myFunction(); // call myFunction (from main) return 0;}// Define myFunctionvoid myFunction() { printf("Some text in myFunction\n")...
在英语中,我们通常会说 "We use the extern keyword to declare a variable or function that is defined elsewhere."(我们使用extern关键字来声明在其他地方定义的变量或函数)。在这个句子中,"use...to"(使用...来)是一个常见的表达方式,表示使用某种工具或方法来达到某种目的。"declare"(声明)和 "define"(...
用宏来写SWAP #include<stdio.h>#define ADD(a,b) a+b#define SWAP(a,b) {int t = a; a = b; b = t;}intmain(){intx=1;inty=2;SWAP(x,y);//预处理模块把它变成{int t = a; a = b; b = t;}printf("x = %d, y = %d\n",x,y);//x = 2, y = 1, 可以交换了//这里...
To give you a complete overview of this function, we included a special section that explains how the structures that are used by this function to define the actions are composed. In another section, we will explain the errors and possible solutions that the use of sigaction() can cause. ...
第一章,“音频概念”,涵盖了一些最重要的音频概念,如声波、模拟和数字音频、多声道音频和音频文件格式。 第二章,“音频播放”,展示了如何使用 FMOD 加载和播放音频文件,以及如何开始创建一个简单的音频管理器类。 第三章,“音频控制”,展示了如何控制声音的播放和参数,以及如何将声音分组到类别并同时控制它们。
In this example, we use the strdup() function to duplicate a string. Then, we use the printf() function to display the “original” and “duplicate” string pointers in the command console. To do this, we include the “stdio.h” and “string.h” headers in our code and define the ...
Likewise, an identifier currently defined asa function-like macroshall not beredefined by another #define preprocessing directive unless the second definitionis a function-like macro definition that has the same number and spelling ofparameters,
Likewise, an identifier currently defined as a function-like macro shall not be redefined by another #define preprocessing directive unless the second definition is a function-like macro definition that has the same number and spelling of parameters, and the two replacement lists are identical. ...
In the example below, ssGetContStates obtains a pointer to the continuous state vector. The for loop then initializes each state to zero. #define MDL_INITIALIZE_CONDITIONS /* Function: mdlInitializeConditions === * Abstract: * Initialize both continuous states to zero. */ static void mdlInitia...