28 lines
706 B
C++
28 lines
706 B
C++
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// 定义函数, 实现字符串的反转并输出
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// 例如: abcdefg -> gfedcba
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#include <iostream>
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using namespace std;
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void reverse(char str[], int len)
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{
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int i = 0; // 为什么要从 0 开始? 因为字符串的第一个字符是 str[0]
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int j = len - 1 - 1; // 为什么要再减 1? 因为字符串最后一个字符是 '\0'
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for (; i < j; i++, j--)
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{
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str[i] = str[i] ^ str[j];
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str[j] = str[i] ^ str[j];
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str[i] = str[i] ^ str[j];
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}
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}
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int main()
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{
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char str[] = "abcdefg";
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int len = sizeof(str) / sizeof(str[0]);
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cout << "原字符串: " << str << endl;
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reverse(str, len);
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cout << "反转后: " << str << endl;
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return 0;
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}
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