int iArray[5], index, temp;

printf("please enter a Array:\n");

for (index = 0; index < 5; index++)

{

scanf("%d", &iArray[index]);

}

printf("original Arrat is:\n");

for (index = 0; index < 5; index++)

{

printf("%d ", iArray[index]);

}

printf("\n");

/*

数组元素为[0,1,2,3,4]

交换过程为 [0] 与 [4] 交换  此时: index=0, 4-index=4;

          [1] 与 [3] 交换  此时：index=1, 4-index=3;

*/

for (index = 0; index < 2; index++)

{

temp = iArray[index];              // 暂存这个元素的值

iArray[index] = iArray[4 - index]; // 给这元素重新赋值

iArray[4 - index] = temp;          // 把暂存的值赋给另一个元素

}

printf("Now Array is:\n");

for (index = 0; index < 5; index++)

{

printf("%d ", iArray[index]);

}

printf("\n");