C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(7)
C³ÌÐòÊÇÓÉÒ»×é»òÊDZäÁ¿»òÊǺ¯ÊýµÄÍⲿ¶ÔÏó×é³ÉµÄ¡£ º¯ÊýÊÇÒ»¸ö×ÔÎÒ°üº¬µÄÍê³ÉÒ»¶¨Ïà¹Ø¹¦ÄܵÄÖ´ÐдúÂë¶Î¡£ÏÂÃæÐ¡±àºÍ´ó¼Ò·ÖÏíÏÂCÓïÑÔÖеĺ¯Êý¡£
1. fgetcº¯Êý
fgetcº¯ÊýµÄ¹¦ÄÜÊÇ´ÓÁ÷ÖжÁÈ¡×Ö·û£¬ÆäÓ÷¨ÊÇ£ºint fgetc(FILE *stream); ³ÌÐòÀý×ÓÈçÏ£º
#include <string.h>
#include <stdio.h>
#include <conio.h>
int main(void)
{
FILE *stream;
char string[] = "This is a test";
char ch;
/* open a file for update */
stream = fopen("DUMMY.FIL", "w+");
/* write a string into the file */
fwrite(string, strlen(string), 1, stream);
/* seek to the beginning of the file */
fseek(stream, 0, SEEK_SET);
do
{
/* read a char from the file */
ch = fgetc(stream);
/* display the character */
putch(ch);
} while (ch != EOF);
fclose(stream);
return 0;
}
2. fgetcharº¯Êý
fgetcharº¯ÊýµÄ¹¦ÄÜÊǹرմò¿ªÁ÷£¬ÆäÓ÷¨ÊÇ£ºint fgetchar(void); ³ÌÐòÀý×ÓÈçÏ£º
#include <stdio.h>
int main(void)
{
char ch;
/* prompt the user for input */
printf("Enter a character followed by \
<Enter>: ");
/* read the character from stdin */
ch = fgetchar();
/* display what was read */
printf("The character read is: '%c'\n",
ch);
return 0;
}
3. freadº¯Êý
freadº¯ÊýµÄ¹¦ÄÜÊÇ´ÓÒ»¸öÁ÷ÖжÁÊý¾Ý£¬ÆäÓ÷¨ÊÇ£ºint fread(void *ptr, int size, int nitems, FILE *stream); ³ÌÐòÀý×ÓÈçÏ£º
#include <string.h>
#include <stdio.h>
int main(void)
{
FILE *stream;
ch
Ïà¹ØÎĵµ£º
#include <stdio.h>
long long mod(long long a,long long b)
{
return (a % b + b) % b;
}
struct triple
{
long long d,x,y;
};
long long Euclid(long long a,long long b)
{
if(b == 0)
return a;
else
retu ......
Á´±í¶¨Òå¼°²Ù×÷µÄÔ´Îļþ£ºemployee.h
//
#pragma once
#ifndef __EMPLOYEE_H__
#define __EMPLOYEE_H__
#include<stdio.h>
#include<malloc.h>
typedef struct employee{
int id;
int age;
int salary;
}EmpType;
typedef struct Node{
EmpType data;
struct Node *next;
}L ......
//linuxϱàÒëg++ $(mysql_config --cflags) ***.cpp $(mysql_config --libs)
/*mysqlÊý¾Ý¿âÖбíµÄÄÚÈÝ
mysql> select * from maindb;
+------------------+---------+-------------+---------+----------+---------------------+---------------------+---------------------+------------------- ......
curl c api
¹ØÓÚCurlµÄ½éÉܺܶ࣬ÕâÀï²»Ïêϸ½éÉÜ£¬Ö÷Ҫ̸һϼòµ¥Ó¦Óá£
×î½üÑо¿ÁËÒ»ÏÂLinuxϵÄcurl C API,curl c APIµÄÎĵµ±È½Ï·á¸»£¬Î¨Ò»¾ÍÊDzéÕÒÆðÀ´£¬·ÑЩʱ¼ä¡£CurlµÄC APIºÍcurlµÄPHP API£¬º¯Êý½Ó¿ÚºÍ×÷ÓôóÖÂÏàͬ£¬ËùÒÔÈç¹ûÓÐPHP APIʹÓþÑéÓ¦¸ÃºÜºÃÀí½â¡£
1£ºCURLcode curl_global_init(long flags);º¯ ......
ʱ³£ÔÚcppµÄ´úÂëÖ®Öп´µ½ÕâÑùµÄ´úÂë:
#ifdef __cplusplus
extern "C" {
#endif
//Ò»¶Î´úÂë
#ifdef __cplusplus
}
#endif
¡¡¡¡ÕâÑùµÄ´úÂëµ½µ×ÊÇʲôÒâË¼ÄØ£¿Ê×ÏÈ£¬__cplusplusÊÇcppÖеÄ×Ô¶¨Òåºê£¬ÄÇô¶¨ÒåÁËÕâ¸öºêµÄ»°±íʾÕâÊÇÒ ......