判断 ACdream 1202 Integer in C++-白红宇

判断 ACdream 1202 Integer in C++

阅读量：6212 次

发布时间：2019-06-21

本文共 3110 字，大约阅读时间需要 10 分钟。

1 /* 2     分情况讨论，在long long范围里可以直接比较 3     sscanf 直接读到n中去 4 */ 5 #include 
     
       6 #include 
      
        7 #include 
       
         8 #include 
        
          9 #include 
         
          10 #include 
          11 #include 
           
            12 #include 
            
             13 using namespace std;14 15 const int MAXN = 1e4 + 10;16 const int INF = 0x3f3f3f3f;17 18 int main(void) //ACdream 1202 Integer in C++19 {20 //freopen ("G.in", "r", stdin);21 22 string s; string s_max = "9223372036854775807";23 while (cin >> s)24 {25 long long n;26 int len = s.size ();27 if (s[0] != '-')28 {29 if (len < 19)30 { 31 sscanf (s.c_str (), "%lld", &n);32 if (n <= 32767) cout << "short" << endl;33 else if (n <= 2147483647) cout << "int" << endl;34 else cout << "long long" << endl;35 }36 else if (len == 19)37 {38 if (s > s_max) cout << "It is too big!" << endl;39 else cout << "long long" << endl;40 }41 else cout << "It is too big!" << endl;42 }43 else44 {45 if (len < 20)46 {47 sscanf (s.c_str (), "%lld", &n);48 if (n >= -32768) cout << "short" << endl;49 else if (n >= 2147483647) cout << "int" << endl;50 else cout << "long long" << endl;51 }52 else if (len == 20)53 {54 s.erase (s.begin ());55 if (s < s_max) cout << "long long" << endl;56 else cout << "It is too big!" << endl;57 }58 else cout << "It is too big!" << endl;59 }60 }61 62 return 0;63 }64 65 /*66 -32768 to 3276767 -2147483648 to 214748364768 -9223372036854775808 to 922337203685477580769 short, int, long long70 It is too big!71 */

1 /* 2     for循环保存n 3     注意：2147483647 + 1 -> -2147483648，-2147483648 > 2147483647 4         在二进制中并不是数学的比大小 5 */ 6 #include 
     
       7 #include 
      
        8 #include 
       
         9 #include 
        
         10 #include 
         
          11 #include 
          12 #include 
           
            13 #include 
            
             14 using namespace std;15 16 const int MAXN = 1e4 + 10;17 const int INF = 0x3f3f3f3f;18 19 int main(void) //ACdream 1202 Integer in C++20 {21 freopen ("G.in", "r", stdin);22 23 string s;24 char ss[33], ss_ll1[] = "9223372036854775808", ss_ll2[] = "9223372036854775807";25 26 while (scanf ("%s", &ss) == 1)27 {28 int len = strlen (ss); long long n;29 if (len > 20) puts ("It is too big!");30 else if (ss[0] == '-')31 {32 if (len == 20)33 {34 if (strcmp (ss+1, ss_ll1) <= 0) puts ("long long");35 else puts ("It is too big!");36 }37 else if (len < 20)38 {39 n = 0;40 for (int i=1; i
             
              = -32768 && n <= 32767) puts ("short");43 else if (n >= -2147483648 && n <= 2147483647) puts ("int");44 else puts ("long long");45 }46 }47 else if (len <= 19)48 {49 if (len == 19)50 {51 if (strcmp (ss, ss_ll2) <= 0) puts ("long long");52 else puts ("It is too big!");53 }54 else55 {56 n = 0;57 for (int i=0; i
              
               = -32768 && n <= 32767) puts ("short");59 else if (n <= 2147483647 && n >= -2147483648) puts ("int");60 else puts ("long long");61 }62 }63 else puts ("It is too big!");64 }65 66 return 0;67 }68 69 /*70 -32768 to 3276771 -2147483648 to 214748364772 -9223372036854775808 to 922337203685477580773 short, int, long long74 It is too big!75 */