缘由编程，逆序存入数组的元素_编程语言-CSDN问答

#define N 7
main() 
{
static int a[N]={12,9,16,5,7,2,l},k,s;
for(k=0;k<N;k++) 
Printf("%4d",a[k]);

for (k=0;k<N/2; k++) 
{s=a[k];
a[k]=a[N-1-k];
a[N-1-k]=s;
}  

for (k=0;k<N;k++)
Printf("%4d", a[k]);
}