数据业务开发部案例15-strlen误用导致内容重叠.doc

7 试题
void Exchange(char* str_Input , char* str_output)
{
 for(int i = 0; i< (int)strlen(str_Input); i++)
 {
     str_output[i] = str_Input[i] - 32; //把小写字母全部转化为大写字母。
 }
 str_output[i] = 0;
}

int main()
{ 
    char OrgBuff[4][20] = {"this is a example","lost temple","qwenilaohuu","end"};
    char DestBuff[4][20] = {0};
    char tmp_exchange[20];
 
    for (int i = 0; i < 4; i++)
    {
        memcpy(tmp_exchange, OrgBuff[i], strlen(OrgBuff[i]));
        Exchange(tmp_exchange, DestBuff[i]);
    }
    return 0;
}

请选择出DestBuff[3]的内容哪个正确（C）

A: ENDS IS A EXAMPLE
B: END
C: ENDNILAOHUUXAMPLE
D: ENDNILAOHUU