c++中int向char转换的原理 c++ 如何把一个int转为char*
C++\u4e2d\u7684int\u548cchar\u4e4b\u95f4\u7684\u8f6c\u6362\u95ee\u9898\u9996\u5148\u4f60\u8981\u6e05\u695a\uff0c\u5728C++\u4e2dint\u578b\u53604\u4e2a\u5b57\u8282\uff0c\u800cchar\u7c7b\u578b\u53ea\u53601\u4e2a\u5b57\u8282\uff0cchar\u7c7b\u578b\u662f\u53ef\u4ee5\u8f6c\u5316\u4e3aint\u7c7b\u578b\u7684\uff0c\u4f46int\u7c7b\u578b\u4e0d\u4e00\u5b9a\u53ef\u4ee5\u8f6c\u6362\u4e3achar\u7c7b\u578b\u3002
\u6211\u5bf9\u4f60\u8fd9\u4e2a\u95ee\u9898\u7684\u7406\u89e3\u662f\uff0c\u4f60\u60f3\u5c060\u52309\u4e4b\u95f4\u7684\u6570\u5b57\u8f6c\u5316\u4e3achar\u7c7b\u578b\u7684\uff0c\u6216\u662f\u5c06'0'-'9'\u4e4b\u95f4\u7684\u5b57\u7b26\u8f6c\u5316\u4e3aint\u578b\u7684\u6570\u5b57\u3002
\u4f60\u5982\u679c\u8981\u7528\u5f3a\u5236\u8f6c\u6362\u7684\u8bdd\u53ef\u4ee5\u8fd9\u6837\uff1a\uff080\u7684ASCII\u7801\u662f48\uff09
int a;
char b;
a=(int)(b-48);\u6216b=(char)(a+48);
//\u8fd9\u6837\u8f6c\u5316\u7684\u524d\u63d0\u662fa\u7684\u8303\u56f4\u662f0-9\uff0cb\u7684\u8303\u56f4\u662f'0'-'9'
\u5728\u5b9e\u9645\u8fd0\u7528\u4e2d\uff0c\u5728\u6574\u578b\u548c\u5b57\u7b26\u578b\u4e4b\u95f4\u8f6c\u5316\u7528\u5f97\u8f83\u591a\u7684\u5e94\u8be5\u8981\u7b97int\u578b\u4e0echar *\u7c7b\u578b\u4e4b\u95f4\u7684\u8f6c\u5316\u4e86\u3002\u8fd9\u4e2a\u65f6\u5019\u53ef\u4ee5\u7528atoi\uff08\u5b57\u7b26\u578b\u8f6c\u6574\u578b\uff0c\u53ef\u4ee5\u5206\u5f00\u7406\u89e3a to i\uff09\u548citoa\uff08\u6574\u578b\u8f6c\u5b57\u7b26\u578b\uff0ci to a\uff09\uff0c\u5982\uff1a
int a=11111
char* b="33333";
a=atoi(b);//\u5c06\u6574\u578b\u8f6c\u5316\u4e3a\u5b57\u7b26\u4e32
\u6216
itoa(a,b,10);//\u5c06\u5b57\u7b26\u4e32\u8f6c\u5316\u4e3a\u6574\u578b\uff0c\u6700\u540e\u4e00\u4e2a\u53c2\u6570\u662f\u8fdb\u5236\uff0c\u5728\u8fd9\u91cc\u662f10\u8fdb\u5236
\u628aint\u7c7b\u578b\u6570\u5b57\u8f6c\u6210char\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a
char b[4];i
nt a\uff1b
for(int i=00;i<4;i++)
{
b[i]=(char)a;
a=a>>8;
}
int\u7528\u4e8e\u7b26\u53f7\u222b\uff0cint(s)\u7b26\u53f7\u8868\u8fbe\u5f0fs\u7684\u4e0d\u5b9a\u79ef\u5206\u3002int(s,v)\u7b26\u53f7\u8868\u8fbe\u5f0fs\u5173\u4e8e\u53d8\u91cfv\u7684\u4e0d\u5b9a\u79ef\u5206\u3002int(s,a,b)\u7b26\u53f7\u8868\u8fbe\u5f0fs\u7684\u5b9a\u79ef\u5206, a,b\u5206\u522b\u4e3a\u79ef\u5206\u7684\u4e0b\u9650\u548c\u4e0a\u9650\u3002
int(s,v,a,b)\u7b26\u53f7\u8868\u8fbe\u5f0fs\u5173\u4e8e\u53d8\u91cfv\u4ece a\u5230b\u7684\u5b9a\u79ef\u5206\uff0c\u5f53int\u6c42\u4e0d\u51fa\u7b26\u53f7\u89e3\uff0c\u4f1a\u81ea\u52a8\u8f6c\u6c42\u6570\u503c\u89e3\u3002
\u6269\u5c55\u8d44\u6599\u5982\u679c\u4e00\u4e2a\u53d8\u91cf\u58f0\u660e\u65f6\u5728\u524d\u9762\u4f7f\u7528 * \u53f7\uff0c\u8868\u660e\u8fd9\u662f\u4e2a\u6307\u9488\u578b\u53d8\u91cf\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u8be5\u53d8\u91cf\u5b58\u50a8\u4e00\u4e2a\u5730\u5740\uff0c\u800c *\uff08\u6b64\u5904\u7279\u6307\u5355\u76ee\u8fd0\u7b97\u7b26 * \uff0c\u4e0b\u540c\u3002C\u8bed\u8a00\u4e2d\u53e6\u6709 \u53cc\u76ee\u8fd0\u7b97\u7b26 *\uff09 \u5219\u662f\u53d6\u5185\u5bb9\u64cd\u4f5c\u7b26\uff0c\u610f\u601d\u662f\u53d6\u8fd9\u4e2a\u5185\u5b58\u5730\u5740\u91cc\u5b58\u50a8\u7684\u5185\u5bb9\u3002\u6307\u9488\u662f C \u8bed\u8a00\u533a\u522b\u4e8e\u5176\u4ed6\u540c\u65f6\u4ee3\u9ad8\u7ea7\u8bed\u8a00\u7684\u4e3b\u8981\u7279\u5f81\u4e4b\u4e00\u3002
\u6307\u9488\u4e0d\u4ec5\u53ef\u4ee5\u662f\u53d8\u91cf\u7684\u5730\u5740\uff0c\u8fd8\u53ef\u4ee5\u662f\u6570\u7ec4\u3001\u6570\u7ec4\u5143\u7d20\u3001\u51fd\u6570\u7684\u5730\u5740\u3002\u901a\u8fc7\u6307\u9488\u4f5c\u4e3a\u5f62\u5f0f\u53c2\u6570\u53ef\u4ee5\u5728\u51fd\u6570\u7684\u8c03\u7528\u8fc7\u7a0b\u5f97\u5230\u4e00\u4e2a\u4ee5\u4e0a\u7684\u8fd4\u56de\u503c\uff0c\u4e0d\u540c\u4e8ereturn\uff08z\uff09\u8fd9\u6837\u7684\u4ec5\u80fd\u5f97\u5230\u4e00\u4e2a\u8fd4\u56de\u503c\u3002
int到char是ASC码啊？
char c=a,是将a代表的字符赋值给c.322转换成16进制就是B了。所以c=B
由于B的ASCII为66，故b=66
int是4位, char是1位(0-255), 322>255, 所以会被截断322%256就是66, 66对应的字符就是B
直接用强制类型转换就行了比如
char
c
='0x04';
int
i
=(int)c;
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