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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ### 數值溢出 當超過一個數據類型能夠存放最大的范圍時,數值會溢出. ### 有符號位最高位溢出的區別 符號位溢出會導致數的正負發生改變,但最高位的溢出會導致最高位丟失. ~~~ int a = 2147483647; int len1 = sizeof(a); printf("%d\n", len1); printf("%d\n", a); int b = a + 1; int len2 = sizeof(b); printf("%d\n", len2); printf("%d\n", b); ~~~ ``` 4 2147483647 //int類型4個字節可以表示最大的正整數, 二進制是 0111 1111 1111 1111 1111 1111 1111 1111 4 -2147483648 //加1后變成 1111 1111 1111 1111 1111 1111 1111 1111 ,符號位變成了1,所以是負數 ```
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