刷LeetCode的时候经常要解决越界的问题，比如INT_MIN取绝对值就越界了，所以知道没种类型的最小值及最大值很有必要。
long和int一般都是4字节，但是long在32位系统和64位系统不同，但我自己电脑64位win 8.1测试还是4个字节，可能和VS的设置也有关系。
所以解决越界问题用long long代替int就OK了。
1 #include<iostream> 2 #include<string> 3 #include <limits> 4 using namespace std; 5 6 int main() 7 { 8 cout << "type: " << "************size**************"<< endl; 9 cout << "bool: " << "所占字节数：" << sizeof(bool); 10 cout << " 最大值：" << (numeric_limits<bool>::max)(); 11 cout << " 最小值：" << (numeric_limits<bool>::min)() << endl; 12 cout << "char: " << "所占字节数：" << sizeof(char); 13 cout << " 最大值：" << (numeric_limits<char>::max)(); 14 cout << " 最小值：" << (numeric_limits<char>::min)() << endl; 15 cout << "signed char: " << "所占字节数：" << sizeof(signed char); 16 cout << " 最大值：" << (numeric_limits<signed char>::max)(); 17 cout << " 最小值：" << (numeric_limits<signed char>::min)() << endl; 18 cout << "unsigned char: " << "所占字节数：" << sizeof(unsigned char); 19 cout << " 最大值：" << (numeric_limits<unsigned char>::max)(); 20 cout << " 最小值：" << (numeric_limits<unsigned char>::min)() << endl; 21 cout << "wchar_t: " << "所占字节数：" << sizeof(wchar_t); 22 cout << " 最大值：" << (numeric_limits<wchar_t>::max)(); 23 cout << " 最小值：" << (numeric_limits<wchar_t>::min)() << endl; 24 cout << "short: " << "所占字节数：" << sizeof(short); 25 cout << " 最大值：" << (numeric_limits<short>::max)(); 26 cout << " 最小值：" << (numeric_limits<short>::min)() << endl; 27 cout << "int: " << "所占字节数：" << sizeof(int); 28 cout << " 最大值：" << (numeric_limits<int>::max)(); 29 cout << " 最小值：" << (numeric_limits<int>::min)() << endl; 30 cout << "unsigned: " << "所占字节数：" << sizeof(unsigned); 31 cout << " 最大值：" << (numeric_limits<unsigned>::max)(); 32 cout << " 最小值：" << (numeric_limits<unsigned>::min)() << endl; 33 cout << "long: " << "所占字节数：" << sizeof(long); 34 cout << " 最大值：" << (numeric_limits<long>::max)(); 35 cout << " 最小值：" << (numeric_limits<long>::min)() << endl; 36 cout << "unsigned long: " << "所占字节数：" << sizeof(unsigned long); 37 cout << " 最大值：" << (numeric_limits<unsigned long>::max)(); 38 cout << " 最小值：" << (numeric_limits<unsigned long>::min)() << endl; 39 cout << "double: " << "所占字节数：" << sizeof(double); 40 cout << " 最大值：" << (numeric_limits<double>::max)(); 41 cout << " 最小值：" << (numeric_limits<double>::min)() << endl; 42 cout << "long double: " << "所占字节数：" << sizeof(long double); 43 cout << " 最大值：" << (numeric_limits<long double>::max)(); 44 cout << " 最小值：" << (numeric_limits<long double>::min)() << endl; 45 cout << "float: " << "所占字节数：" << sizeof(float); 46 cout << " 最大值：" << (numeric_limits<float>::max)(); 47 cout << " 最小值：" << (numeric_limits<float>::min)() << endl; 48 cout << "size_t: " << "所占字节数：" << sizeof(size_t); 49 cout << " 最大值：" << (numeric_limits<size_t>::max)(); 50 cout << " 最小值：" << (numeric_limits<size_t>::min)() << endl; 51 cout << "string: " << "所占字节数：" << sizeof(string) << endl; 52 cout << "type: " << "************size**************"<< endl; 53 return 0; 54 }
