#include <stdio.h> #define N 10 int   main() {        double   x[N]={1.1,2.2,3.3,4.4,5.5,6.6,7.7,8.8,9.0,9.9}            int    i;           double   *pf,*pt;          void  swap(double *, double *);         for  ( pf=x, pt=&x[N-1}; pf<pt; ++pf,__pt)              swap(pf,pt);         for (i=0;i<N;++i)             printf("\nx[%d]=%f,"i,x[i]);             return(0); } void   swap(  double *px,  double *py) {                 double   temp;                    temp=*px;                    *px=*py;                    *py=temp; }

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