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                # 基本數據類型 > 下面的占用空間大小都是我電腦上的輸出 ```c #include <stdio.h> int main(int argc, char const *argv[]) { printf("sizeof(char)\t%lu\n",sizeof(char)); printf("sizeof(short)\t%lu\n",sizeof(short)); printf("sizeof(int)\t%lu\n",sizeof(int)); printf("sizeof(float)\t%lu\n",sizeof(float)); printf("sizeof(double)\t%lu\n",sizeof(double)); printf("sizeof(long)\t%lu\n",sizeof(long)); return 0; } ``` 數據類型 | 說明 | 字節 ------- | ------- | ------- char | 字符型 | 1 short|短整型|2 int | 整型| 4 float|單精度浮點型|4 double|雙精度浮點型|8 long|長整型|8 各類型還可以配合`unsigned `使用,mysql 中也經常看到 # 結合類型 `*`(指針),`[]`(數組) # 自定義 `struct`,`enum`,`union` # 空類型 `void`
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