(一)
#include<stdio.h>
int main()
{
int a,b;
scanf("%d%d",&a,&b);
printf("a=%d b=%d\n",a,b);
a=a+b;
b=a-b;
a=a-b;
printf("a=%d b=%d\n",a,b);
return 0;
}
(二)
#include<stdio.h>
int main()
{
int a,b,c;
scanf("%d%d",&a,&b);
printf("a=%d b=%d\n",a,b);
c=a;
a=b;
b=c;
printf("a=%d b=%d\n",a,b);
return 0;
}
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