UVa 465 - Overflow-优快云博客

本文链接：https://blog.youkuaiyun.com/Invalid_Pointer/article/details/8574689

本文介绍了一个程序设计任务：读取两个非负整数及一个运算符，并判断输入的整数或运算结果是否超出正常有符号整数的表示范围。通过C语言实现，文章展示了如何解析输入、执行加法或乘法操作并检查结果是否溢出。

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Overflow

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 (typeinteger if you are working Pascal, type int if you are working in C).

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'', ``second number too big'', ``result too big''.

Sample Input

300 + 3
9999999999999999999999 + 11

Sample Output

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

#include <stdio.h>
#include <string.h>
#include<stdlib.h>
int main()
{
    char s[600],n[600],c;
    double z,x,y;
    while(scanf("%s %c %s",s,&c,n)!=EOF)
        {
           printf("%s %c %s\n",s,c,n);
           x=atof(s);
           y=atof(n);
           if(c=='*')z=x*y;
           if(c=='+')z=x+y;
           if(x>2147483647)printf("first number too big\n");
           if(y>2147483647)printf("second number too big\n");
           if(z>2147483647)printf("result too big\n");
        }
    return 0;
}