各种数据类型的最大/小值的常量
#include<bits/stdc++.h> using namespace std; int main() { cout<<INT_MAX<<endl; //2147483647............2^31-1 cout<<INT_MIN<<endl; //-2147483648 cout<<LLONG_MAX<<endl; //9223372036854775807.........2^63-1 cout<<LLONG_MIN<<endl; //-9223372036854775808 cout<<ULLONG_MAX<<endl; //18446744073709551615............2^64-1 }
#include<bits/stdc++.h> using namespace std; void print(__int128 x) { if(x<0) putchar('-'),x=-x; if(!x) return ;print(x/10),putchar(x%10+48); } int main() { __int128 ans=1; for(int i=1;i<=126;i++) { ans=ans*2; cout<<i<<" "; print(ans); cout<<endl; } print(ans*2-1); }
#include<iostream> #include<string> #include <limits> using namespace std; int main() { cout << "type: \t\t\t" << "************size**************"<< endl; cout << "short: \t\t\t" << "字节数:" << sizeof(short) <<endl; cout << "最大值:" << (numeric_limits<short>::max)(); cout << "\t\t最小值:" << (numeric_limits<short>::min)() << endl; cout << "int: \t\t\t" << "字节数:" << sizeof(int) <<endl; cout << "最大值:" << (numeric_limits<int>::max)(); cout << "\t最小值:" << (numeric_limits<int>::min)() << endl; cout << "unsigned: \t\t" << "字节数:" << sizeof(unsigned) <<endl; cout << "最大值:" << (numeric_limits<unsigned>::max)(); cout << "\t最小值:" << (numeric_limits<unsigned>::min)() << endl; cout << "long: \t\t\t" << "字节数:" << sizeof(long) <<endl; cout << "最大值:" << (numeric_limits<long>::max)(); cout << "\t最小值:" << (numeric_limits<long>::min)() << endl; cout << "unsigned long: \t\t" << "字节数:" << sizeof(unsigned long) <<endl; cout << "最大值:" << (numeric_limits<unsigned long>::max)(); cout << "\t最小值:" << (numeric_limits<unsigned long>::min)() << endl; cout << "long long: \t\t" << "字节数:" << sizeof(long long) <<endl; cout << "最大值:" << (numeric_limits<long long>::max)(); cout << "\t\t最小值:" << (numeric_limits<long long>::min)() << endl; cout << "unsigned long long: \t" << "字节数:" << sizeof(unsigned long long) <<endl; cout << "最大值:" << (numeric_limits<unsigned long long>::max)(); cout << "\t\t最小值:" << (numeric_limits<unsigned long long>::min)() << endl; cout << "double: \t\t" << "字节数:" << sizeof(double) <<endl; cout << "最大值:" << (numeric_limits<double>::max)(); cout << "\t最小值:" << (numeric_limits<double>::min)() << endl; cout << "long double: \t\t" << "字节数:" << sizeof(long double) <<endl; cout << "最大值:" << (numeric_limits<long double>::max)(); cout << "\t最小值:" << (numeric_limits<long double>::min)() << endl; cout << "float: \t\t\t" << "字节数:" << sizeof(float) <<endl; cout << "最大值:" << (numeric_limits<float>::max)(); cout << "\t最小值:" << (numeric_limits<float>::min)() << endl; return 0; }