Time Zone HDU - 6308

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
	int T, h, m;
	double s;
	char fu[20];
	scanf("%d", &T);
	while (T--)
	{
		scanf("%d %d ", &h, &m);
		scanf("%s", fu);       
		sscanf(fu + 4, "%lf", &s);
		
		int newh, newm;
		newh = s / 1;            
		if (fu[3] == '+')
		{
			h += (newh - 8);    
			newm = (s - newh) * 60 + 0.01; 
			m += newm;        
		}
		else
		{
			h = h - newh - 8;
			newm = (s - newh) * 60 + 0.01; 
			m -= newm;
		}
		if (m >= 60) 
		{
			m -= 60;
			h++;
		}
		if (h >= 24)
		{
			h -= 24;
		}
		if (m<0)
		{
			m += 60;
			h--;
		}
		if (h<0)
		{
			h += 24;
		}
		printf("%02d:%02d\n", h, m); 
	}
	return 0;
}

总结：难点在输入问题，用sscanf(fu + 4, "%lf", &s);将输入的字符串转化成浮点数。