#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAME " GIGGA"
#define ADDEWSS "101"
#define PLACE "Megapolis CA "
#define WIDTH 40
void starbar (void );
void main()
{
starbar();
printf("%s \n ", MAME);
printf("%s \n ",ADDEWSS);
printf("%s \n",PLACE);
starbar();
system("pause");
}
void starbar (void )
{
int count ;
for (count = 1 ; count <= WIDTH; count++) {
putchar('*');
}
putchar('\n');
}
I
各种复用
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAME " GIGGA"
#define ADDEWSS "101"
#define PLACE "Megapolis CA "
#define WIDTH 40
#define SPACE ' '
//void starbar (void );
void show_n_char (char ch , int num);
void main()
{
int spaces;
show_n_char('*',WIDTH);
show_n_char(SPACE,12);
printf("%s\n",MAME);
spaces = (WIDTH - strlen (ADDEWSS))/2;
show_n_char(SPACE,spaces);
printf("%s \n" ,ADDEWSS);
show_n_char (SPACE,(WIDTH - strlen (PLACE))/2);
printf("%s \n" ,PLACE);
show_n_char('*' , WIDTH);
system("pause");
}
void starbar (void )
{
int count ;
for (count = 1 ; count <= WIDTH; count++) {
putchar('*');
}
putchar('\n');
}
void show_n_char (char ch , int num)
{
int count ;
for (int count = 0; count <= num; count++)
{
putchar(ch);
}
}
找出最小数
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int imin(int ,int);
void main()
{
int evi11,evi12;
printf("q quit \n");
while (scanf(" %d %d", &evi11,&evi12) == 2)
{
printf(" the lesser of %d and %d is %d .\n" , evi11,evi12,imin(evi11,evi12));
}
printf("\n");
}
int imin(int n ,int m)
{
int min;
if (n < m)
{
min = n;
}
else
min = m;
return min;
}
\
使用函数 原形
#include <stdlib.h>
int imin(int ,int);//
void main()
{
// printf(" the lesser of %d and %d is %d .\n" , 3,5,imin(3 ));
printf(" the lesser of %d and %d is %d .\n" , 3 ,5,imin(3.0,5.0));
system("pause");
}
int imin(int n ,int m)
{
int min;
if (n < m)
{
min = n;
}
else
min = m;
return min;
}
递归
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void up_and_down(int n )
{
printf("lever %d n liocation %p \n" , n ,&n );
if(n < 4)
{
up_and_down(n+1);
}
printf("lever %d n liocation %p \n" , n ,&n );
}
void main()
{
up_and_down(1 );
system("pause");
}
使用循环和递归 计算阶乘
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
long face (int );
long rfacet (int );
void main()
{
int num ;
printf(" this program clculates \n");
printf(" enter a valiue in the rang q ");
while (scanf ("%d",&num) == 1)
{
if (num < 0 )
{
printf(" no ne");
}
else if (num > 12)
{
printf(" keep \n");
}
else
{
printf("loop %d facetorial = %ld \n" , num,face(num));
printf("recursion%d factorial = %ld \n ",num ,rfacet(num));
}
}
system("pause");
}
long face(int n )
{
long ans ;
for ( ans = 0; n>1; n --)
{
ans *= n;
}
return ans;
}
long rfacet(int n )
{
long ans ;
if(n > 0 )
ans = n * rfacet(n-1);
else
ans = 1;
return ans;
}
递归实现二进制运算
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void to_binary(unsigned long);
int main()
{
unsigned long number;
printf ("enter an integer q\n ");
while (scanf("%ul",&number) == 1 )
{
to_binary(number);
putchar('\n');
}
system ( "pause");
}
void to_binary(unsigned long n)
{
int r ;
r = n %2;
if ( n >=2)
{
to_binary(n/2);
}
putchar('0' + r);
}
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include "stdafx.h"
int menu(void)
{
int code , status;
printf(" \n %s %s \n",STARS,STARS);
printf("1,fair arms ,2 hotel ,3 ,char ,4 the ,5 quit\n");
printf(" \n %s %s \n",STARS,STARS);
while ((status = scanf("%d", &code)) != 1 || (code < 1 || code> 5) );
{
if (status != 1 )
{
scanf("%*s");
}
printf(" to 5 ");
}
return code;
}
int getnights (void )
{
int nights;
while (scanf("%d",&nights ) != 1)
{
scanf("%*s");
}
return nights;
}
void showprice ( double rate ,int nights)
{
int n ;
double total = 0.0;
double factor = 1.0;
for ( n = 1; n <= nights; n++, factor *= DISCOUNT)
{
total += rate * factor;
}
printf(" tje tpta; cpst woll be %0.2f\n",total);
}
#include < stdio.h>
#include "stdafx.h"
int main()
{
int nights ;
double hotel_rate;
int code;
while ((code = menu()) != QUIT)
{
switch (code)
{
case 1 :
hotel_rate = HOTEL1;
break;
case 2 :
hotel_rate = HOTEL2;
break;
case 3 :
hotel_rate = HOTEL3;
break;
case 4 :
hotel_rate = HOTEL4;
break;
default:
hotel_rate = 0.0;
printf("oooops\n");
break;
}
nights = getnights();
showprice (hotel_rate,nights);
}
printf("hello \n");
}
#include <stdio.h>
#define QUIT 5
#define HOTEL1 80.00
#define HOTEL2 125.00
#define HOTEL3 155.00
#define HOTEL4 200.00
#define DISCOUNT 0.95
#define STARS "*********************"
int menu(void );
int getnights (void);
void showprice (double,int);
函数的 副本 机制
#include <stdio.h>
#include <stdlib.h>
void mikado (int );
void main()
{
int pooh = 2 ,bah = 5;
printf(" In mikado () , pooh = %d and &pooh = %p \n", pooh,&pooh);
printf(" In mikado () , bah = %d and &pooh = %p \n", bah,&bah);
mikado(pooh);
printf("hello");
system("pause");
}
void mikado (int bah)
{
int pooh = 10 ;
printf(" In mikado () , pooh = %d and &pooh = %p \n", pooh,&pooh);
printf(" In mikado () , bah = %d and &pooh = %p \n", bah,&bah);
}
指针交换两个数值
#include <stdio.h>
#include <stdlib.h>
void interchang (int *,int *);
void main()
{
int x = 5 , y = 10 ;
printf(" x = %d y = %d ", x,y);
interchang (&x,&y);
printf("\n x = %d y = %d ", x,y);
system("pause");
}
void interchang( int *u ,int *v)
{
int temp ;
temp = *u ;
*u = *v ;
*v = temp;
//printf("\n u = %d v = %d ", u,v);
}
通过
通过指针变量 获取有关zippo的值
#include <stdio.h>
#include <stdlib.h>
#define SIZE 5
void main()
{
int zippo [4][2] = {{2,4},{6,8},{1,3},{5,7} };
int (*pz)[2];
pz = zippo;
printf("pz = %p pz + 1 = %p \n",pz,pz+1 );
printf("pz[0] = %p pz[0]+1 = %p, \n",pz[0] ,pz[0]+1);
printf("*pz = %p *pz +1 = %p, \n",*pz ,*pz +1);
printf("pz[0][0] = %d \n",pz[0][0] );
printf("*pz [0] = %d \n",*pz[0] );
printf("pz[2][1] = %d \n",pz[2][1] );
printf(" pz[2][1] = %d \n", *(*(pz+2)+1) );
system("pause");
}
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