#include <iostream>#include <math.h>#include <string.h>#include<ctime>using namespace std;char swap(char &a,char &b)
{char tmp;tmp = a;a = b;b = tmp;
}int time(int t)
{for(;t>0;t--){cout << t << endl;}
}int main ()
{int u = 100;char x[10] ;strcpy(x,"m.pcd");char y[10] ;strcpy(y,"nn_0");cout<<x[2]<<endl;swap(x,y);cout<<x<<endl;cout<<y<<endl;clock_t start,finish;start=clock();while(u){time(100);u = u - 1;}finish=clock();cout << finish-start << "/" << CLOCKS_PER_SEC << " (s) "<< endl;return 0;}//main over
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