网站建设的英语怎么说,怎么推广游戏叫别人玩,做网站网站违法吗,wp-wordpress当执行算术运算时#xff0c;如果类型不同都会发生类型转换 1、如果整形转换为signed不丢失数据#xff0c;就转换为signed.否则需要转换为unsigned 如: 一类型为signed int,另一类型为unsigned short,因为signed可以容纳unsigned short的全部值#xff0c;所以unsigned sho…当执行算术运算时如果类型不同都会发生类型转换 1、如果整形转换为signed不丢失数据就转换为signed.否则需要转换为unsigned 如: 一类型为signed int,另一类型为unsigned short,因为signed可以容纳unsigned short的全部值所以unsigned short会转为signed int. 一类型为unsigned int另一类型为signed int,则signed int会转换为unsigned int. Demo1: 1 main()2 {3 if(-1 (unsigned char)1)4 {5 //会进入到这里unsigned char会转换为signed int6 }7 else8 {9 //不会进入到这里
10 }
11 } Demo2 1 main()2 {3 if(-1 (unsigned int)8)4 {5 6 }7 else8 {9 //要小心了会进入到这里因为-1类型为signed,会转换为unsigned int类型而二进制位又没变所以-1是会被理解为一个很大的正数
10 }
11 } 转载于:https://www.cnblogs.com/275095923/archive/2013/01/06/2847169.html
