设已知数组长度为LENGTH，则新声明一个长度为LENGTH+1的数组： unsigned char c[LENGTH];for (i = 0; i < LENGTH; i++) { if (s[i] < 0x0A) c[i] = s[i] + ' '; else c[i] = s[i] - 0x0A + 'a';}s[i] = 0;
