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
ǰһƪ½²Á˼òµ¥µÄC/C++µ÷ÓÃPython½Å±¾Ä£¿é£¨.py£©¡£¼ÈÈ»ÊÇÓÃÓÚÖî¶àÓÎÏ·³ÌÐòµÄ½Å±¾ÓïÑÔ£¬Äǿ϶¨ÊÇȱ²»ÁË»¥µ÷£¨ÀñÉÐÍùÀ´£©¡£Òò´Ë£¬±¾Æª½²Ò»¸ö¼òµ¥µÄpythonµ÷ÓÃC/C++дµÄDLLÄ£¿é£¬¶ÔPython½øÐй¦ÄÜÀ©Õ¹¡£ÕâÀïдһ¸ö¼òµ¥µÄÀý×Ó£¬Ö÷Òª¾ÍΪÁËÁ˽âÏÂÕâôÓÃPythonÀ´µ÷ÓÃC/C++дµÄDLL¿â¡£ºÃÁË£¬ÇÐÈëÕýÌ⣺
Ê×ÏÈ£¬ÎÒÊÇÓÃVS2003 ......
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 ......
ÔÚCÓïÑÔÖУ¬½á¹¹ÊÇÒ»ÖÖ¸´ºÏÊý¾ÝÀàÐÍ£¬Æä¹¹³ÉÔªËØ¼È¿ÉÒÔÊÇ»ù±¾Êý¾ÝÀàÐÍ£¨Èçint¡¢long¡¢floatµÈ£©µÄ±äÁ¿£¬Ò²¿ÉÒÔÊÇһЩ¸´ºÏÊý¾ÝÀàÐÍ£¨ÈçÊý×é¡¢½á¹¹¡¢ÁªºÏµÈ£©µÄÊý¾Ýµ¥Ôª¡£ÔڽṹÖУ¬±àÒëÆ÷Ϊ½á¹¹µÄÿ¸ö³ÉÔ±°´Æä×ÔÈ»¶Ô½ç£¨alignment£©Ìõ¼þ·ÖÅä¿Õ¼ä¡£¸÷¸ö³ÉÔ±°´ÕÕËüÃDZ»ÉùÃ÷µÄ˳ÐòÔÚÄÚ´æÖÐ˳Ðò´ ......
C++¶Ôʱ¼äµÄ²Ù×÷Ò²ÓÐÐí¶àÖµµÃ´ó¼Ò×¢ÒâµÄµØ·½¡£×î½ü£¬ÔÚ¼¼ÊõȺÖÐÓкܶàÍøÓÑÒ²¶à´ÎÎʵ½¹ýC++ÓïÑÔÖжÔʱ¼äµÄ²Ù×÷¡¢»ñÈ¡ºÍÏÔʾµÈµÈµÄÎÊÌâ¡£ÏÂÃæ£¬ÔÚÕâÆªÎÄÕÂÖУ¬±ÊÕß½«Ö÷Òª½éÉÜÔÚC/C++ÖÐʱ¼äºÍÈÕÆÚµÄʹÓ÷½·¨.
ͨ¹ýѧϰÐí¶àC/C++¿â£¬Äã¿ÉÒÔÓкܶà²Ù×÷¡¢Ê¹ÓÃʱ¼äµÄ·½·¨¡£µ«Ô ......
ͻ񻣼
±¾ÎÄ´Ó½éÉÜ»ù´¡¸ÅÄîÈëÊÖ£¬Ì½ÌÖÁËÔÚC/C++ÖжÔÈÕÆÚºÍʱ¼ä²Ù×÷ËùÓõ½µÄÊý¾Ý½á¹¹ºÍº¯Êý£¬²¢¶Ô¼ÆÊ±¡¢Ê±¼äµÄ»ñÈ¡¡¢Ê±¼äµÄ¼ÆËãºÍÏÔʾ¸ñʽµÈ·½Ãæ½øÐÐÁ˲ûÊö¡£±¾ÎÄ»¹Í¨¹ý´óÁ¿µÄʵÀýÏòÄãչʾÁËtime.hÍ·ÎļþÖÐÉùÃ÷µÄ¸÷ÖÖº¯ÊýºÍÊý¾Ý½á¹¹µÄÏêϸʹÓ÷½·¨¡£
¹Ø¼ü×Ö£ºUTC£¨ÊÀ½ç±ê׼ʱ¼ä£©£¬Calendar Time£¨ÈÕÀúʱ¼ä£©£¬epoch ......