#include <stdio.h>
int main(void)
{
    int a, b;

    a =5;
    b =2;  /* line 7 */
    b =a;  /* line 8 */
    a =b;  /* line 9 */
      
    printf("%d %d\n",b,a);

    return 0;

}

可以搜搜顺序结构是什么~

从上到下依次赋值，你可以单步进行查看详细的赋值情况

#include <stdio.h>
int main(void)
{
    int a, b;

    a =5;
    b =2;  /* line 7 */
    printf("%d %d\n",b,a);

    b =a;  /* line 8 */
    a =b;  /* line 9 */
      
    printf("%d %d\n",b,a);

    return 0;

}

#include <stdio.h>
int main(void)
{
    int a, b;

    a =5;
    b =2;  /* line 7 */
    printf("%d %d\n",b,a);

    b =a;  /* line 8 */
    a =b;  /* line 9 */
      
    printf("%d %d\n",b,a);

    return 0;

}