为何会进入死循环？？？

Question

#include <stdio.h>

int main(void){
	const int covstm = 60,covsth = 3600;
	int h,m,s,s0 = 0;
	while(s0 > -1)
	{
		printf("请输入秒或者-1退出:\n");
		scanf("d%",&s0);
		s = s0;
		h = s/covsth;
		m = s%covsth/covstm;
		s = s%covsth%covstm;
		printf("您输入的是%8d秒:\n，转化为时分秒为：%8d小时，%8d分钟，%8d秒钟！\n",s0,h,m,s);
		
	}
return 0;

一直执行最后一个printf，结果还不对！

Answer 1

scanf("d%",&s0)
改为
scanf("%d",&s0);
格式符写错了