C/C++——С±à̸CÓïÑÔº¯ÊýÄÇЩÊÂ(13)
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1. mallocº¯Êý
mallocº¯ÊýµÄ¹¦ÄÜÊÇÄÚ´æ·ÖÅ亯Êý£¬ÆäÓ÷¨Îª£ºvoid *malloc(unsigned size);³ÌÐòʵÀýÈçÏ£º
#include <stdio.h>
#include <string.h>
#include <alloc.h>
#include <process.h>
int main(void)
{
char *str;
if ((str = malloc(10)) == NULL)
{
printf("Not enough memory to allocate buffer\n");
exit(1); /* terminate program if out of memory */
}
strcpy(str, "Hello");
printf("String is %s\n", str);
free(str);
return 0;
}
2. memchrº¯Êý
memchrº¯ÊýµÄ¹¦ÄÜÊÇÔÚÊý×éµÄÇ°n¸ö×Ö½ÚÖÐËÑË÷×Ö·û£¬ÆäÓ÷¨Îª£ºvoid *memchr(void *s, char ch, unsigned n); ³ÌÐòʵÀý´úÂëÈçÏ£º
#include <string.h>
#include <stdio.h>
int main(void)
{
char str[17];
char *ptr;
strcpy(str, "This is a string");
ptr = memchr(str, 'r', strlen(str));
if (ptr)
printf("The character 'r' is at position: %d\n", ptr - str);
else
printf("The character was not found\n");
return 0;
}
3. memicmpº¯Êý
memicmpº¯ÊýµÄ¹¦ÄÜÊDZȽÏÁ½¸ö´®s1ºÍs2µÄÇ°n¸ö×Ö½Ú, ºöÂÔ´óСд£¬ÆäÓ÷¨Îª£ºint memicmp(void *s1, void *s2, unsigned n);³ÌÐòʵÀý´úÂëÈçÏ£º
#include <stdio.h>
#include <string.h>
int main(void)
{
char *buf1 = "ABCDE123";
char *buf2 = "abcde456";
int stat;
stat = memicmp(buf1, buf2, 5);
printf("The strings to position 5 are ");
if (stat)
printf("not ");
&
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1. harderrº¯Êý
harderrº¯ÊýµÄ¹¦ÄÜÊǽ¨Á¢Ò»¸öÓ²¼þ´íÎó´¦Àí³ÌÐò£¬ÆäÓ÷¨ÊÇ£ºvoid harderr(int (*fptr)());³ÌÐòÀý×ÓÈçÏ£º
#include <stdio.h>
......
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1. initgraphº¯Êý
initgraphº¯ÊýÊdzõʼ»¯Í¼ÐÎϵͳ£¬ÆäÓ÷¨Îª£ºvoid far initgraph(int far *graphdriver, int far *graphmode,char far *pathtodriver); ³ÌÐòÀý×ÓÈçÏ£ ......
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Eclipse×÷Ϊһ¿î¼«ÆäÓÅÐãµÄJava IDE£¬ÒѾµÃµ½¹ã·ºµÄÈÏ¿É¡£µ±È»Eclipse²¢²»ÏÞÓÚJava¿ª·¢£¬ÓÉÓÚÆäÓÅÐãµÄ»ù´¡¼Ü¹¹£¬EclipseÒѾ³ÉΪһ¸ö¿ÉÒÔÈÝÄÉÒ»ÇÐÓ뿪·¢ÓйصŤ¾ßµÄƽ̨¡£
µ±È»ÈÝÄÉÒ»Çв¢²»Òâζ×ÅÊʺÏÓÚÒ»ÇС£ÏñC/C++ÕâÑùÔç¾Í´æÔڵIJ¢¹ã·ºÓ¦ÓõÄÓïÑÔ£¬Ôç¾ÍÓÐÒ»´óÅú¿ÉÓõÄIDE£¬Ò²ÓкܶàÈËϲ»¶ÓÃvi/emacs×÷Ϊ×Ô¼ºµÄ¿ ......
5¡¢#defineºê¶¨Òå¡£ºêÖ»ÊǼòµ¥µÄÎı¾Ìæ»»£¬ºÜÈÝÒ×ÒýÆðÆçÒå¡£
#include <stdio.h>
#define CONS(a,b) (int)(a##e##b)
#define STR(s) #s
int main()
{
printf(STR(vck));
printf("\n");
printf("%d\n",CONS(2,3));
return 0; ......
½ñÌìÎÞÊ£¬ÔÚÂÛ̳ÉÏÒ»Ö±¿´Ìù×Ó£¬ºÜÉÙ¶¯ÊÖʵ¼ù£¬½ñÌìÊÔ×ÅдÁËÒ»¸ö¶ÁÈ¡Ô´³ÌÐò´úÂëÐÐÊýµÄÀý×Ó£º
ÏÖÔڵĴúÂëÈçÏ£¬¿ÉÄÜ»¹Óв»ÍêÉƵĵط½£¬ÒÔºóÔٸĽø£º
#include <stdio.h>
#define CHARCOUNT 255
#define CON 6 /*µ¥ÐÐ×¢ÊÍ×îÉÙµÄʱºò*/
int realLength = 0;
/*
* function name: strCount
* function : count ......