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常用头文件和宏/* #pragma warning (disable: 4786) #pragma comment (linker, "/STACK:0x800000") */ #include <cassert> #include <cctype> #include <cmath> #include <cstdio> #include <cstdlib> #include <cstring>

a |= 0x20; /* turn on bit 0x20 */ a &= ~0x20; /* turn off bit 0x20 */ a ^= 0x20; /* toggle bit 0x20 */ if (a & 0x20) { /* then the 0x20 bit is on */ } Binary Value Sample