编辑代码

#include <stdio.h>
int GCD(int Length, int Width) 
{

	if (Length % Width ==0){
        return Width;
	}

    return GCD(Width,Length%Width);
	
}

int main(void) 
{
	int Length = 1680, Width = 640;
	printf("%d\n", GCD(Length, Width));
	return 0;
}