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2¡¢#define,const
3¡¢Îļþ¿½±´µÄ´úÂë,¶¯Ì¬Éú³ÉÄÚ´æ,¸´ºÏ±í´ïʽ,strcpy,memcpy,sizeof
4¡¢º¯Êý²ÎÊý´«µÝ,ÄÚ´æ·ÖÅ䷽ʽ,ÄÚ´æ´íÎó±íÏÖ,mallocÓënewÇø±ð
5¡¢ÀàÖØÔØ¡¢Òþ²ØÓ븲¸ÇÇø±ð,externÎÊÌâ,º¯Êý²ÎÊýµÄȱʡֵÎÊÌâ,ºê´úÂëÓëÄÚÁªº¯ÊýÇø±ð
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1¡¢if,for,switch,goto
if:
bool int float pointer char ±äÁ¿µÄʹÓ÷½·¨
bool bParam;
int iParam;
float fParam;
int* pParam;
char cParam;
if(bParam) ,if(!bParam);
if(iParam == 0 ),if(iParam != 0 );
if(fParam>= -0.00001 && fParam <= 0.00001);
if(pParam == NULL),if(pParam != NULL);
if(cParam == '\0'),if(cParam != '\0');
if/else/return µÄʹÓ÷½·¨
if(condition) ¿ÉÒԵȼÛΪ return (condition?x:y);
{
return x;
}
else
{
return y;
}
for:
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int row,col,sum;
int a[100][5];
for(row=0;row <100;row++) ЧÂʵÍÓÚ for(col=0;col <5;col++)
{ {
for(col=0;col <5;col++) for(row=0;row <100;row++)
{ {
sum = sum+a[row][col]; sum = sum+a[row][col];
} }
} }
int i;
for(i=0;i <N;i++) ЧÂʵÍÓÚ if(condition)
{&n
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#include <stdio.h>
#include <windows.h>
#include <mysql.h>
#define host "localhost"
#define username "root"
#define password "123"
#define database "oa"
MYSQL *conn;
int main()
{
MYSQL_RES *res_set;
MYSQL_ROW row;
unsigned int i,ret;
FILE *fp;
MYSQL_FIELD *field;
......
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HANDLE CreateThread(
PSECURITY_ATTRIBUTES psa,
DWORD cbStackSize,
PTHREAD_START_ROUTINE pfnStartAddr,
PVOID pvParam,
DWORD dwCreateFlags,
PDWORD pdwThreadID) ......