<分区>
到目前为止，我必须使用交换语句对整数进行降序排序，但它不起作用
#include <stdio.h>
int main()
{
int round, num1, num2;
for (round =0; round <= 3; round++)
printf("Enter two integers: \n");
scanf("%d, %d", &num1, &num2);
printf("The numbers in descending order: %d, %d\n", num1,num2);
return 0;
}
void swap(int num1,int num2)
{
if (num1 < num2);
swap (num2, num1);
}