465 - Overflow

Time limit: 3.000 seconds

Write a program that reads an expression consisting of two non-negative integer and an operator. Determine if either integer or the result of the expression is too large to be represented as a ``normal'' signed integer (type integer if you are working Pascal, type int

Input

An unspecified number of lines. Each line will contain an integer, one of the two operators + or *, and another integer.

Output

For each line of input, print the input followed by 0-3 lines containing as many of these three messages as are appropriate: ``first number too big

Sample Input

300 + 3
9999999999999999999999 + 11

Sample Output

300 + 3
9999999999999999999999 + 11
first number too big
result too big

如標題所述。

完整程式碼：

/*0.019s*/

#include<cstdio>
const double maxint = -1u >> 1;

char str[600];

int main()
{
	double a, b;
	char op;
	while (gets(str))
	{
		puts(str);
		sscanf(str, "%lf %c %lf", &a, &op, &b);
		if (a > maxint) puts("first number too big");
		if (b > maxint) puts("second number too big");
		if (op == '+' && a + b > maxint || op == '*' && a * b > maxint) puts("result too big");
	}
	return 0;
}