Question

c语言用指针和自定义函数实现数组元素的调换

利用交换函数Swap（），用函数编程实现两个数组中对应元素值的交换。

Answer 1

#include <stdio.h>

#define N 10

void Swap ( int *a, int *b, int n);

int main(void)
{
int *a, *b;
int num1[N], num2[N];

for (a = num1; a < num1 + N; a++)
scanf ("%d", a);

for (b = num2; b < num2 + N; b++)
scanf ("%d", b);

a = num1;//重新指向首地址
b = num2;//重新指向首地址

Swap (a, b, N);
printf ("*********交换后**********\n");

for (a = num1; a < num1 + N; a++)
printf ("%3d", *a);

printf ("\n");

for (b = num2; b < num2 + N; b++)
printf ("%3d", *b);

return 0;
}
void Swap (int *a, int *b, int n)
{
int temp;
int i;

for (i = 0; i < n; i++)
{
temp = *(a + i);
*(a + i) = *(b + i);
*(b + i) = temp;
}
}