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C_ÅжÏÓï¾äifÓëelseµÄ×éºÏʹÓÃ

 Ô´Âë:
# include <stdio.h>
 
int main()
{
    int x, y;
    printf("ÇëÊäÈë×Ô±äÁ¿x£º");
    scanf("%d", &x);
 
    if(x < 6)
    {
        y = x - 12;
        printf("x = %d, y = %d\n", x, y);
    }
    else if(x < 15)
    {
        y = 3*x - 1;
        printf("x = %d, y = %d\n", x, y);
    }
    else
    {
        y = 5*x + 9;
        printf("x = %d, y = %d\n", x, y);
    }
    return 0;
}


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extern ¡°C¡±Ó÷¨

ÓÃÒ»¾ä»°¸ÅÀ¨extern “C”Õâ¸öÉùÃ÷µÄÕæÊµÄ¿µÄ¾ÍÊÇʵÏÖC++ÓëC¼°ÆäËüÓïÑԵĻìºÏ±à³Ì¡£
extern "C"µÄ¹ßÓ÷¨
£¨1£©ÔÚC++ÖÐÒýÓÃCÓïÑÔÖеĺ¯ÊýºÍ±äÁ¿£¬ÔÚ°üº¬CÓïÑÔÍ·Îļþ£¨¼ÙÉèΪcExample.h£©Ê±£¬Ðè½øÐÐÏÂÁд¦Àí£º
extern "C"
{
££i nclude "cExample.h"
}
¶øÔÚCÓïÑÔµÄÍ·ÎļþÖУ¬¶ÔÆäÍⲿº¯ÊýÖ»ÄÜÖ¸¶¨ÎªexternÀà ......

C unsigned Ó÷¨

Àý£º#define NELE(a) (sizeof(a) / sizeof(a[0]))
int main() {
char str[] = {'E', 'M', 'C'};
for (int d=-1; d<=(NELE(str)-2);d++)
      printf("%c",str[d+1]);
return 0;
}
ÅжÏprintf£¨£©Êä³öµÄÊÇʲô£¬½á¹û¿ÉÄܳöºõÒâÁÏ£¬Ê²Ã´Ò²Ã»ÓÐÊä³ö£¬Ô­ÒòÄØ£¿Ô­Òò ......

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Õû¸öÔËÐÐÆÚ¼ä¶¼´æÔÚ¡£ÀýÈçÈ«¾Ö±äÁ¿£¬static ±äÁ¿¡£
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ÓÉCÊý×éarray[

        ×òÌìÒ»¸öͬѧºÍÎÒ̸ÆðËûÔÚ²âÊÔC³ÌÐòʱʱ·¢ÏÖʹÓÃ-1ΪϱêÀ´·ÃÎÊÊý×飬gcc²¢Ã»Óб¨´í£¬¶øÇÒÄܹ»ÔËÐгɹ¦£¬Õâ¸öÒÔǰÎÒ»¹Ã»ÊÔ¹ý£¬´¦ÓÚºÃÆæ£¬½ñÌìÏÂÎç³éÁ˵ãʱ¼ä¿´ÁËһϡ£
     ÏÂÃæÊÇÎÒʹÓõIJâÊÔ´úÂ룬ÔËÐл·¾³ÊÇDEV-C++4.9.9.2£¬±àÒëÆ÷ʹÓõÄÊÇgcc¡£
&nb ......

C_תÒå×Ö·û

 Ô´Âë:
# include <stdio.h>
 
int main()
{
    /* »»Ðзû'\n'£¬ÓÃÓÚÊä³ö»»ÐÐ */
    printf("How are you?\n");
    printf("I am fine.\n\n");
 
    /* ºáÏòÌø¸ñ·û'\t'£¬Ê¹Ìøµ½ÏÂÒ»¸öÊä³öÇø */
  ......
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