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  "contentMarkdown": "# C语言int&unsigned int与二进制类型\n\n# C语言int&unsigned int与二进制类型\n\n> 创建时间：2020/3/31 11:52\n\n## C语言int&unsigned int与二进制类型\n\n**任何数据都是以其二进制的补码形式存储在内存中的**\nint占几个字节是与电脑编译器有关的。不过现在大部分电脑int占4个字节，即32位\n\n### unsigned int\n\n32个0~32个1，即：0~4294967295\n\nshort int 是16位的，无符号的范围是0~65535\n\n### ((signed)int)\n\nint实际上是signed int ，我们通常省略signed\n补码表示\n范围：-2147483648~2147483647\n\n```cpp\nstring str1 = "test";\nstring str2 = "test";\n\n```\n\n### char和int的转换\n\n```cpp\nstring str1 = "test";\nstring str2 = "test";\n\n```\n\nint转换成char会切割\nchar转换成int又会在前面全加上1\n\n130转换成char的时候它在内存中变成了\n1000 0010\n再转换成int类型就会变成\n1111 1111 1111 1111 1111 1111 1000 0010（\n补码）\n\n输出的时候要输出原码\n转换成原码：\n1000 0000 0000 0000 0000 0000 0111 1110\n所以最后的结果就是-126\n"
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