数据类型(C++)
不同系統(tǒng)會有不同差異:
| 類型 | 位(byte) | 范圍 |
| char | 1 | -128—127 or 0 – 255 |
| unsigned char | 1 | 0 – 255 |
| signed int | 1 | -128—127 |
| int | 4 | -2^31 – 2^32-1 |
| unsigned int | 4 | 0 – 2^32 |
| signed int | 4 | -2^31 – 2^32-1 |
| short int | 2 | 2^15 – 2^15-1 |
| unsigned short int | 2 | 0 – 2^16 |
| signed short int | 2 | 2^15 – 2^15-1 |
| long int | 8 | -2^63 – 2^63-1 |
| signed long int | 8 | -2^63 – 2^63-1 |
| unsigned long int | 8 | 0 – 2^64 |
| float | 4 | +/- 3.4e +/-38(~7個數(shù)字) |
| double | 8 | +/-1.7e +/- 308(~15個數(shù)字) |
| long double | 16 | +/-1.7e +/- 208(~15個數(shù)字) |
?
浮點數(shù)float和double兩種數(shù)據(jù)類型和其他數(shù)據(jù)類型存儲方式不同
轉(zhuǎn)載于:https://www.cnblogs.com/wanghao-boke/p/11305013.html
總結(jié)
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