C_Êý¾ÝÀàÐÍת»»
Ô´Âë:
# include <stdio.h>
int main()
{
/* ¶¨Òå±äÁ¿²¢¸³³õÖµ */
int a = 5;
char c = 'a'; // 'a'µÄASCÂëµÄֵΪ97
float f = 5.3;
double m = 12.65;
double result;
/* ͬÀàÐÍÊý¾Ý¼ä½øÐÐÔËËã²¢Êä³ö½á¹û */
printf("a + c = %d\n", a + c); // 97+5=102
printf("a + c = %c\n", a + c); // 102¶ÔÓ¦µÄASCIIÂë×Ö·ûΪ'f'
printf("f + m = %f\n", f + m); // 5.3+12.65=17.95
/* ²»Í¬ÀàÐÍÊý¾Ý¼ä½øÐÐÔËËã²¢Êä³ö½á¹û */
printf("a + m = %f\n", a + m); //5+12.65=17.65
printf("c + f = %f\n", c + f); //97+5.3=102.3
/* ½«ÉÏÊöËĸö±äÁ¿½øÐлìºÏÔËË㣬²¢Êä³ö½á¹û */
result = a + c * (f + m);
printf("double = %f\n", result); //5+97*(5.3+12.65)=1746.15
return 0;
}
Ïà¹ØÎĵµ£º
ÏñPHPºÍperlÒ»Ñù£¬MySQLÒ²ÌṩµÄCÓïÑÔʹÓõÄAPI. C´úÂëµÄAPIÊÇËæMySQLÒ»Æð·¢²¼µÄ¡£ Ëü°üº¬ÔÚmysqlclient¿âÖУ¬ ¿ÉÒÔʹC³ÌÐòÀ´·ÃÎÊÊý¾Ý¿â¡£
MySQLÔ´Âë°üÖеÄÐí¶à¿Í»§¶Ë¶¼ÊÇÓÃCдµÄ¡£ Èç¹ûÄãÕýÔÚÕÒʹÓÃÕâЩC APIµÄÀý×Ó£¬ ¿ÉÒÔ¿´¿´¿Í»§¶ËµÄд·¨¡£Äã¿ÉÒÔÔÚMySQLÔ´Âë°üµÄclientsĿ¼ÕÒµ½ÕâЩÀý×Ó¡£
& ......
ÓÃC/C£«£«Ð´CGI³ÌÐò
ʹÓÃCGIC¿âµÄ¼òÒª£º
¿âµÄº¯Êý˵Ã÷£º http://www.boutell.com/cgic/#cgiFormStringNoNewlines
1. ´òÓ¡CGI±ê×¼Êä³öÍ·²¿£º
cgiHeaderContentType£¨"text/plain"£©£»
»òÕߣº
......
ÏÂÃæÕâ¸ö³ÌÐòÊä³öʲô£¿
enum {false,true};
int main()
{
int i=1;
do
{
printf("%d\n",i);
i++;
if(i < 15)
continue;
}while(false);
return 0;
}
ÄãÏàÐÅô£¿Ï ......
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 ......
×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 ......