定义指针pa，pb，输入a，b，输出两个变量的和，差，积，商，调整指针的指向，pa指向较大的变量，pb指向较小的变量

好的，这是一个关于指针的问题。

首先，我们需要定义两个指针pa和pb，以及两个变量a和b。代码如下：

int *pa, *pb;
int a, b;

接下来，我们需要输入a和b，可以使用scanf函数：

scanf("%d %d", &a, &b);

然后，我们可以通过指针来获取a和b的值，同时计算它们的和、差、积和商：

*pa = a;
*pb = b;

int sum = *pa + *pb;
int diff = *pa - *pb;
int product = *pa * *pb;
int quotient = *pa / *pb;

接下来，我们需要判断a和b的大小，然后将指针pa指向较大的变量，pb指向较小的变量：

if (a > b) {
    pa = &a;
    pb = &b;
} else {
    pa = &b;
    pb = &a;
}

最后，我们可以输出结果：

printf("Sum: %d\n", sum);
printf("Difference: %d\n", diff);
printf("Product: %d\n", product);
printf("Quotient: %d\n", quotient);

完整代码如下：

#include <stdio.h>

int main() {
    int *pa, *pb;
    int a, b;

    printf("Enter two numbers:\n");
    scanf("%d %d", &a, &b);

    *pa = a;
    *pb = b;

    int sum = *pa + *pb;
    int diff = *pa - *pb;
    int product = *pa * *pb;
    int quotient = *pa / *pb;

    if (a > b) {
        pa = &a;
        pb = &b;
    } else {
        pa = &b;
        pb = &a;
    }

    printf("Sum: %d\n", sum);
    printf("Difference: %d\n", diff);
    printf("Product: %d\n", product);
    printf("Quotient: %d\n", quotient);

    return 0;
}