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Find the defects in each of the following programs, and explain why it is incorrect.
// the function need set corresponding bit in int #define BIT_MASK(bit_pos) (0x01 << (bit_pos)) int Bit_Reset(unsigned int *val, unsigned char pos) { if (pos >= sizeof(unsigned int)*8) { return 0; } *val = (*val && ~BIT_MASK(pos)); return 1; }
析：
*val = (*val && ~BIT_MASK(pos));
是逻辑运算而不是位运算
按如下修改即可
*val = (*val & ~BIT_MASK(pos));
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原文地址：http://www.cnblogs.com/aqing1987/p/4223623.html
