C_利用函数的引用调用实现两数的交换
源码：
# include <stdio.h>
void swap(int *x, int *y);
int main()
{
int i, j;
i = 12;
j = 36;
printf("i and j before swapping: %d %d\n", i, j);
swap(&i, &j); // 传递变量i和j的地址，深刻理解此时：&i为变量的地址，而i为变量（值）
// 调用swap函数的传递过程为：x=&i ; y=&j ;
printf("i and j after swapping: %d %d\n", i, j);
return 0;
}
void swap(int *x, int *y) // 深刻理解此时：*x为变量（值）而x为指针（地址）
{
int temp;
temp = *x; /* 存储变量x的值 */
*x = *y; /* 将y的值放入到x中 */
*y = temp; /* 将x的值放入到y中 */
}
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源码:
# include <stdio.h>
int main()
{
/* 定义了一个无符号字符型变量，此变量只能用来存储无符号数 */
unsigned char result;
int a, b, c, d;
a = 2;
b = 4; ......
源码:
# include <stdio.h>
int main()
{
/* 定义一个整形指针p */
int *p;
int begin, end;
begin = 10;
/* 给指针p赋初值 */
p = &begin;
& ......
源码:
# include <stdio.h>
int main()
{
int x, y, num1, num2, temp;
printf("请输入两个正整数：\n");
scanf("%d %d", &num1, &num2);
if(num1 < num2)
......
源码：
# include <stdlib.h>
# include <stdio.h>
int main()
{
int month;
int day;
printf("please input the month number: ");
scanf("%d", &mo ......
源码：
/* 学生成绩查询系统 */
# include <stdio.h>
# include <stdlib.h>
int main( )
{
int select;
int i, j;
int score[5][7];
int average = 0;
int sum = 0;
&n ......
