junmoyo

#include <stdio.h>

int g_nMaxValue = 256; // 전역변수 생성과함께 초기화해줘야한다.

int main(void)

{//프로그램 시작점

{

int l_nValue; // 지역변수

l_nValue = 0;

}

//l_nValue = 13; // 호출하면  error 가 됩니다.

printf("g_nMaxValue 의 값 : %d", g_nMaxValue);

return 0;

}

#include <stdio.h>

int output(char *pString)

{

int len = 0;

char *pPoint = NULL;

pPoint = pString;

while (*pPoint != '\0')

{

putchar(*pPoint);

++pPoint;

++len;

}

return len;

}

int main(void)

{

char* pString = "Hello World!! \n";

printf("pString 길이는 %d \n", output(pString));

return 0;

#include <stdio.h>

#define true (unsigned char)1

#define false (unsigned char)0

typedef unsigned char bool;

int main(void)

{

bool bIsRun = true;

printf(" true의값 %d \n false의 값 %d \n", true, false);

if (bIsRun == true)

{

printf("bisRun 은 true 입니다. \n");

}

else if (bIsRun == false)

{

printf("bisRun 은 false 입니다. \n");

}

return 0;

}

#include <stdio.h>

enum eGameStatus

{

GAME_STATUS_NON,

GAME_STATUS_NUM01,

GAME_STATUS_NUM02,

GAME_STATUS_NUM03,

GAME_STATUS_END

};

int main(void)

{

enum eGameStatus status = GAME_STATUS_NON;

status = GAME_STATUS_NUM01;

switch (status)

{

case GAME_STATUS_NON:

printf("selected GAME_STATUS_NON \n");

break;

case GAME_STATUS_NUM01:

printf("selected GAME_STATUS_NUN01 \n");

break;

case GAME_STATUS_NUM02:

printf("selected GAME_STATUS_NUN02 \n");

break;

case GAME_STATUS_NUM03:

printf("selected GAME_STATUS_NUN03 \n");

break;

default:

printf("selected GAME_STATUS_END \n");

break;

}

return 0;

}

#include <stdio.h>

union unValue

{

int  nNum;

float fNum;

char cNum[8];

short sNum;

double  dNum;

long long llNum;

};

int main(void)

{

int count = 0;

union unValue Variable;

for (count = 0; count < 8; count++)

{

Variable.cNum[count] = 'A' + count;

}

printf("%d \n", Variable.llNum);

printf("%d \n", Variable.nNum);

printf("%d \n", Variable.sNum);

printf("%f \n", Variable.fNum);

printf("%f \n", Variable.dNum);

for (count = 0; count < 8; count++)

{

printf("%c \n", Variable.cNum[count]);

}

printf("union nuValue size___________%d \n", sizeof(Variable));

return 0;

}

#include<stdio.h>

#include<string.h>

#define SZ_BUFFER_MAX 256

#define BOOL unsigned int 

#define DWORD  unsigned int 

#define TRUE 1

#define FALSE 0

struct stNeighbor

{

BOOL bEachOther; // 서로 이웃여부 

DWORD  nDate;// 서로 이웃 맺은 날

char szName[SZ_BUFFER_MAX];

char szID[SZ_BUFFER_MAX];

DWORD nCountComment; // 댓글 작성 횟수

DWORD nCountSympathy; // 공감 작성 횟수

DWORD Numbering;

};

int main(void)

{

struct stNeighbor NeighborData;

NeighborData.bEachOther = TRUE;

NeighborData.nDate = 0;//Data 함수를 사용해야하는데지금은 그냥0으로....

strcpy_s(NeighborData.szName, SZ_BUFFER_MAX, "Mozzi");

strcpy_s(NeighborData.szID, SZ_BUFFER_MAX, "bera***");

NeighborData.nCountComment = 28;

NeighborData.nCountSympathy = 33;

printf("데이터 쓰기 완료.\n");

return 0;

}

#include <stdio.h>

int length(char* pStr)

{

int cnt = 0;

char* p = NULL;

p = pStr;

while (*p != '\0')

{

if (*p != '\0')

{

++p;

++cnt;

}

}

return cnt;

}

int main(void)

{

char *pString = "Hello World!!";

printf("%s 의 길이는 : %d\n", pString, length(pString));

return 0;

}

#include<stdio.h>

#include<windows.h>

#define NUM_MIN 1

#define NUM_MAX 45

#define VERSION 1

char Check(char* pList);

int main(void)

{

unsigned char Number[6] = { 0, };

unsigned char Cmd = 0;

unsigned char Reandom = 0;

unsigned char count = 0;

unsigned char GameMaxCount = 0;

unsigned char Games = 0;

char check = 0;

BOOL bIsRun = TRUE;

BOOL bGameRun = TRUE;

while (bIsRun)

{

srand(GetTickCount());

printf("게임명령어( 숫자 1 ~ 5 , c 종료 ) : ");

Cmd = getchar();

fflush(stdin);//enter키 정보 소멸(엔터도 아스키 코드 값이 있다.)

if (Cmd >= '1' && Cmd <= '5')

{

switch (Cmd)

{

case '1':

GameMaxCount = 1;

break;

case '2':

GameMaxCount = 2;

break;

case '3':

GameMaxCount = 3;

break;

case '4':

GameMaxCount = 4;

break;

case '5':

GameMaxCount = 5;

break;

}

//번호 추첨

while (GameMaxCount > Games)

{

for (count = 0; count < 6; count++)

{

Reandom = rand() % NUM_MAX + NUM_MIN;

Number[count] = Reandom;

}

//중복 검사

check = Check(Number);

if (check >= 0 && check <= 5)

{

continue;

}

//번호 출력 

for (count = 0; count <6; count++)

{

printf("%2d ", Number[count]);

}

printf("\n");

Games++;

}

Games = 0;

}

else if (Cmd == 'c' || Cmd == 'C')

{

break;

}

else

{

printf("잘못된 명령어!!!\n");

}

}

return 0;

}

char Check(char* pList)

{

char count = 0;

char befor = 0;

BOOL bRun = TRUE;

for (count = 0; count < 6; count++)

{

for (befor = 0; befor < 6; befor++)

{

if (count == befor)

{

continue;// 같은것 끼리는 패스

}

if (pList[count] == pList[befor])

{

bRun = FALSE;

break;

}

}

if (bRun == FALSE)

{

break;

}

}

return count;

}

#include <stdio.h>

int main(void)

{

int nValue = 14;

int* pValue1 = NULL; //0

int* pValue2 = &nValue;

pValue1 = &nValue;

printf("%d, %d, %d, %d, %d, %d \n", nValue, *pValue1, *pValue2, &nValue, pValue1, pValue2);

return 0;

}

#include <stdio.h>

int main(void)

{

char cArray[3] = { 0, };

int nArray[3] = { 0, };

int count = 0;

printf("cArray 0부터 2까지 인덱스 주소값\n");

for (count; count < 3; count++)

{

printf("cArray[%d] 의 주소  %d \n", count, &cArray[count]);

}

printf("nArray 0부터 2까지 인덱스 주소값\n");

for (count = 0; count < 3; count++)

{

printf("nArray[%d] 의 주소  %d \n", count, &nArray[count]);

}

return 0;

}