haohaojian的专栏

在定时器中刷帧数的方法将帧数打印在屏幕上 static char* My_IntToWideChar1(int i, char* buf){    return (char*)_itow(i, (LPWSTR)buf, 10);}void My_DrawFPS(HDC hdc){    static uint t = 0;    uint fps = 0

//计算器程序中使用函数指针数组v1.0///////作者:郝效禹#include "stdio.h"double add(double a,double b){return a + b;}double sub(double a,double b){return a - b;}double mul(double a,double b){retur

/////////////////////////////////////#include "stdio.h"//***********************用户可编辑使用的函数void callback_good(){printf("so good!\n");}void callback_bad(){printf("so bad!\n");}void

function unpack(t, i)    i = i or 1    if t[i] then       return t[i], unpack(t, i + 1)    endendfunction fwrite(fmt, ...)    return io.write(string.format(fmt, unpack(

function maximum (a)    local mi = 1             -- maximum index    local m = a[mi]          -- maximum value    for i,val in ipairs(a) do       if val > m then           mi = i

程序的内存分配（堆和栈区别）一、预备知识 程序的内存分配一个由c/C++编译的程序占用的内存分为以下几个部分1、栈区（stack）     由编译器自动分配释放 ，存放函数的参数值，局部变量的值等。其操作方式类似于数据结构中的栈。2、堆区（heap）      一般由程序员分配释放， 若程序员不释放，程序结束时可能由OS回收 。注意它与数据结构中的堆是两回事，分配方式倒是类

#include "stdafx.h"#include #include void getptr(char * p){p = (char*)malloc(100);}int main(int argc, char* argv[]){char * pp = NULL;getptr(pp);strcpy(pp,"Hello World!");pr

const char * mychar[] = {#define str1 "hello""sssss"};

#include "stdafx.h"#include "stdio.h"int m = 1;void fcall(int state){switch(state){case 1:   printf("state one!\n");   break;case 2:   printf("state two!\n");   break;def

function reverse(s)    local r = ""    for i = #s, 1, -1 do        r = r .. string.sub(s, i, i)    end    return rendio.write("Input a string: ")s = io.read()io.write("The reverse

“foo.lua”文件：function foo (x)    print(x)endfunction honghong()print("honghong")end--主lua文件function dofile (filename)    local f = assert(loadfile(filename))

function func (sel) --按钮虚拟响应效果函数if(sel == 1) thenprint("key1")else if(sel == 2) thenprint("key2")else if(sel == 3) thenprint("key3")elseprint("null")endende

^not    - (unary)*      /+      -..      =     ~=     ==andor除了^和..外所有的二元运算符都是左连接的

#include"stdio.h"////多参数////////////////long sum(int i,...){int *p,j;long s = 0;p = &i+1;for (j=0;j   s += p[j];    return s;}void main(){long Sum = sum(3,1,2,3);printf("

一、数组名与地址int a[3],大多数早期版本的c语言实现中，并没有所谓“数组的地址”这一概念，因此&a或者被视为非法，或者就等于a。二、二维数组下标用法int calendar[12][31];int *p;int i;calendar[4]当做数组calendar[4]下标为0的数组元素的地址处理，除了sizeof,&i

#include "stdafx.h"#include "stdio.h"#define myprint(x) printf(x);printf("\n\n")int main(int argc, char* argv[]){myprint("hello World!");return 0;}

#include"stdio.h"#include"string.h"#include"stdlib.h"#include"malloc.h"//动态创建二维数组方法一：typedef enum{ style_char, style_short, style_int}Array2Style;typedef struct{ int line; 

1、头文件#ifndef _MULTITEXT_H_#define _MULTITEXT_H_#include "vrecommon.h"#define MULTITEXT_LINE_NUMBER (100)#define MULTITEXT_ALIGN_LEFT (1#define MULTITEXT_ALIGN_HCENTER (1#define MULTITEXT

void printf_on_screen(uint value,int x,int y){    char str[50] = {0};        My_DrawText1(GameSys.hdc,My_IntToWideChar1(value, str), x, y, 50, 50, 255, 0, 0);}//如果是刷屏操作，在定时器回调结束时调用

自己总结的几条数据清空的方法：1、在代码设计的时候变量的默认初始值最好为0或者NULL。2、如果是整型或者是字符型的清零就设置为0和0;3、数组char array[ARRAY_LEN];的清空最好用memset(array,0,sizeof(array));4、结构体的清空最好也用memset(structdata,0,sizeof(structdata));

#include"stdio.h"#include"string.h"#include"stdlib.h"#include"malloc.h"struct s_tag { int b; int a[100];};struct s_tag orange,lime,lemon;struct s_tag twofold(struct s_tag s

附录：C语言运算符及优先级优先级         运算符         含义                   运算符类型        结合方向15         （）         圆括号                             单目            自左向右         []         下标运算符                    

#include #include DWORD WINAPI Fun1Proc(LPVOID lpParameter   // thread data);DWORD WINAPI Fun2Proc(LPVOID lpParameter   // thread data);int index=0;int tickets=100;HANDLE hMute

#include "stdafx.h"typedef enum{one = 5,two,three,} MMI_3D_GAME_LIST_ENUM;MMI_3D_GAME_LIST_ENUM a = three;int main(int argc, char* argv[]){printf("%d\n",a);return 0;}

#include "stdafx.h"#include "myhead.h"#define MMI_3D_GAME_SWITCH(_index)                     \{                                                                \   case _index:               

print "enter your expression:"a = 2b = 3local l = io.read()local func = assert(loadstring("return " .. l))print("the value of your expression is " .. func())enter your expressi

function func (sel)if(sel == 1) thenprint("hello 1")else if(sel == 2) thenprint("hello 2")else if(sel == 3) thenprint("hello 3")elseprint("nobody")endendend

上述规则有一个例外，当函数只有一个参数并且这个参数是字符串或者表构造的时候，()可有可无：print "Hello World"             print("Hello World")dofile 'a.lua'                  dofile ('a.lua')print [[a multi-line            print([[a m

#include "stdio.h"int main(void){   int i,j;   for(j = 0;j {   sound(1000);   for(i = 0;i    delay(10000);   sound(700);   for(i = 0; i    delay(10000);}   nosound();   r