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void Reverse(char s[])
{
    for(int i = 0, j = strlen(s) - 1; i < j; ++i, --j) {
        char c = s[i];
        s[i] = s[j];
        s[j] = c;
    }
}
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    a ^= b;
    b ^= a;
    a ^= b;
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char* strrev1(const char* str)
{
       int len = strlen(str);
       char* tmp = new char[len + 1];
        strcpy(tmp,str);
       for (int i = 0; i < len/2; ++i)
       {
          char c = tmp[i];
           tmp[i] = tmp[len – i - 1];
           tmp[len – i - 1] = c;
        }
       return tmp;
}
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char* strrev2(const char* str)
{
       char* tmp = new char[strlen(str) + 1];
        strcpy(tmp,str);
       char* ret = tmp;
       char* p =


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#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar num;
void main()
{
 TMOD=0x01;
 TH0=(65536-45872)/256;
 TL0=(65536-45872)%256;
 EA=1;
 ET0=1;
 TR0=1;
 P1=0xFF;
 while(1);
}
void T0_time() interrupt 1
{
  ......

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