UVa465 - Overflow

题目地址：点击打开链接

C++代码：

#include <cstdlib>
#include <cstdio>
int main()
{
	char s1[10000],s2[10000];
	double a,b,ans;
	char c;
	while(scanf("%s %c %s",s1,&c,s2)!=EOF)
	{
		a=atof(s1);
		b=atof(s2);
		printf("%s %c %s\n",s1,c,s2);
		if(a>2147483647)
			printf("first number too big\n");
		if(b>2147483647)
			printf("second number too big\n");
		if(c=='+')
			ans=a+b;
		else
			ans=a*b;
		if(ans>2147483647)
			printf("result too big\n");
	}
	return 0;
}