字符串的逆序

//英文字符串逆序

int main(){char str[100] = "hello world";int len = 0;while(str[len])len++;int min = 0;int max = len - 1;while (min < max){char tmp = str[min];str[min++] = str[max];str[max--] = tmp;}printf ("%s\n", str);    return 0;}

// 中文逆序int main3(){char str[] = "你好世界";int len = 0;while(str[len])len++;int min = 0;int max = len - 1;char tmp;while (min < max){tmp = str[min];str[min] = str[max-2];str[max-2] = tmp;tmp = str[min+1];str[min+1] = str[max-1];str[max-1] = tmp;tmp = str[min+2];str[min+2] = str[max];str[max] = tmp;min += 3;max -= 3;}printf ("%d\n", sizeof(str));printf ("%s\n", str);return 0;}

// 统计中英混合字符串长度int main(){char str[] = "abc你好世界";int i = 0;int len = 0;while (str[i]){if (str[i] < 0) i += 2;i++;len++;}printf ("%d\n", sizeof(str));printf ("%d\n", len);return 0;}