Question

编程实现两个整型变量值的交换.说明;a=3,b=4,转换为a=4,b=3;

Answer 1

#include <stdio.h>int main()
{
int a = 3, b = 4;
int tmp; puts("第一种方法:");
tmp = a;
a = b;
b = tmp;
printf("a=%d, b=%d\n", a, b);
a = 3; b =4;
puts("第二种方法:");
a += b;
b = a - b;
a -= b;
printf("a=%d, b=%d\n", a, b);
a = 3; b =4;
puts("第三种方法:");
a ^= b ^= a ^= b;
printf("a=%d, b=%d\n", a, b);
return 0;
}

Answer 2

定义一个中间变量C，把A的值先赋给C，再把B的值赋给A，最后把C再赋给B！C=A;A=B;B=C 你们也学C语言？我们也开了，不过以前在咱学校也学了点，语言都是相通了！

Answer 3

C：声明一个int ：int t下面是交换：｛t=a; a=b; b=t; ｝