c语言程序基础.......

Question

scanf_s("%c%c", &c1,1,&c2,1);

这里面为什莫要在&c1后加，c1  呢？求大佬解答

#include <stdio.h>
int main()
{
	int a, b;
	float x, y;
	char c1, c2;
	scanf_s("a=%db=%d", &a, &b);
	scanf_s("%f%f", &x, &y);
	getchar();
	scanf_s("%c%c",&c1,1,&c2,1);
	printf("a=%d,b=%d,x=%f,y=%f,c1=%c,c2=%c\n", a, b, x, y, c1, c2);
	return 0;
}

Answer 1

是为什么加，1

Sorry