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ä½ç½®ï¼šé¦–页 > C++ å‚考手册 >数值库 >常用数å¦å‡½æ•° > HUGE_VALF, HUGE_VAL, HUGE_VALL
HUGE_VALF, HUGE_VAL, HUGE_VALL
| 定义于头文件 <cmath>
|
||
| #define HUGE_VALF /*implementation defined*/ |
(C++11 èµ·) | |
| #define HUGE_VAL Â /*implementation defined*/ |
||
| #define HUGE_VALL /*implementation defined*/ |
(C++11 èµ·) | |
HUGE_VALF 〠HUGE_VAL å’Œ HUGE_VALL å®å±•å¼€æˆæ£æµ®ç‚¹å¸¸é‡è¡¨è¾¾å¼ï¼Œå®ƒä»¬æ¯”较ç‰äºŽä¸Šæº¢æƒ…况ä¸æµ®ç‚¹å‡½æ•°å’Œè¿ç®—ç¬¦çš„è¿”å›žå€¼ï¼ˆè§ math_errhandling ）。
| Â | |
| å¸¸é‡ | 解释 |
HUGE_VALF
|
展开æˆæŒ‡ç¤ºä¸Šæº¢çš„æ£ float è¡¨è¾¾å¼ |
HUGE_VAL
|
展开æˆæŒ‡ç¤ºä¸Šæº¢çš„æ£ double 表达å¼ï¼Œä¸å¿…å¯è¡¨ç¤ºä¸º float |
HUGE_VALL
|
展开æˆæŒ‡ç¤ºä¸Šæº¢çš„æ£ long double 表达å¼ï¼Œä¸å¿…å¯è¡¨ç¤ºä¸º float 或 double |
在支æŒæµ®ç‚¹æ— 穷大的平å°ä¸Šï¼Œè¿™äº›å®å§‹ç»ˆåˆ†åˆ«å±•å¼€æˆ float 〠double å’Œ long double çš„æ£æ— 穷大。
å‚阅
| (C++11) |
求值为æ£æ— 穷大或ä¿è¯ä½¿ float 上溢的值 (å®å¸¸é‡) |