I see lots of problems about cout/cin , most of them are telling that cin/cout are slow and it's better to use scanf/printf;↵
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but cin/cout are prettier and more easy to code for c++ coders. so i try to make an IO that it's pretty and fast.↵
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~~~~~↵
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#include <bits/stdc++.h>↵
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using namespace std;↵
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class FastIO{↵
public:↵
//Output operators :↵
inline FastIO & operator << (const int &a){ printf("%d" , a); return *this; }↵
inline FastIO & operator << (const long long &a){ printf("%I64d" , a); return *this; }↵
inline FastIO & operator << (const double &a){ printf("%.9f" , a); return *this; }↵
inline FastIO & operator << (const long double &a){ printf("%.9lf" , a); return *this; }↵
inline FastIO & operator << (const char * const&a){ printf("%s" , a); return *this; }↵
inline FastIO & operator << (const string &a){ printf("%s" , a.c_str()); return *this; }↵
//Input operators :↵
inline FastIO & operator >> (int &a){ scanf("%d" , &a); return *this; }↵
inline FastIO & operator >> (long long &a){ scanf("%I64d" , &a); return *this; }↵
inline FastIO & operator >> (double &a){ scanf("%lf" , &a); return *this; }↵
inline FastIO & operator >> (long double &a){ scanf("%lf" , &a); return *this; }↵
inline FastIO & operator >> (char * const&a){ scanf("%s" , a); return *this; }↵
}fastIO;//you can change it to cin/cout ↵
↵
int main(){↵
int a;long long b;double c;↵
fastIO >> a >> b >> c << a << " , " << b << " , " << c << "\n";↵
}↵
↵
~~~~~↵
↵
↵
↵
but cin/cout are prettier and more easy to code for c++ coders. so i try to make an IO that it's pretty and fast.↵
↵
↵
~~~~~↵
↵
#include <bits/stdc++.h>↵
↵
using namespace std;↵
↵
class FastIO{↵
public:↵
//Output operators :↵
inline FastIO & operator << (const int &a){ printf("%d" , a); return *this; }↵
inline FastIO & operator << (const long long &a){ printf("%I64d" , a); return *this; }↵
inline FastIO & operator << (const double &a){ printf("%.9f" , a); return *this; }↵
inline FastIO & operator << (const long double &a){ printf("%.9lf" , a); return *this; }↵
inline FastIO & operator << (const char * const&a){ printf("%s" , a); return *this; }↵
inline FastIO & operator << (const string &a){ printf("%s" , a.c_str()); return *this; }↵
//Input operators :↵
inline FastIO & operator >> (int &a){ scanf("%d" , &a); return *this; }↵
inline FastIO & operator >> (long long &a){ scanf("%I64d" , &a); return *this; }↵
inline FastIO & operator >> (double &a){ scanf("%lf" , &a); return *this; }↵
inline FastIO & operator >> (long double &a){ scanf("%lf" , &a); return *this; }↵
inline FastIO & operator >> (char * const&a){ scanf("%s" , a); return *this; }↵
}fastIO;//you can change it to cin/cout ↵
↵
int main(){↵
int a;long long b;double c;↵
fastIO >> a >> b >> c << a << " , " << b << " , " << c << "\n";↵
}↵
↵
~~~~~↵
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