大模板!!!
阿新 • • 發佈:2018-11-08
NOIP大模板(第一版)
一.檔案輸入,輸出
1 #include<cstdio> 2 using namespace std; 3 int main(void) 4 { 5 freopen("","r",stdin); 6 freopen("","w",stdout); 7 //... 8 fclose(stdin); 9 fclose(stdout); 10 return 0; 11 }
二.輸入,輸出優化!!!(快讀&快輸)
(1)快讀
1.整數讀取 (需要呼叫 <iostream> <cstdio> )
1 inline int read() 2 { 3 int x=0,w=0; 4 char ch=0; 5 while(!isdigit(ch)) w|=ch=='-',ch=getchar(); 6 while(isdigit(ch)) x=(x<<1)+(x<<3)+(ch^48),ch=getchar(); 7 return w?-x:x; 8 }
2.浮點數讀取(需要呼叫 <iostream> <cstdio> )
1 inline double read() 2 { 3 int w=0,y=0; 4 double x=0,t=0.1; 5 char ch=0; 6 while(!isdigit(ch)) w|=ch=='-',ch=getchar(); 7 while(isdigit(ch)) x=x*10+(ch^48),ch=getchar(); 8 y|=ch=='.'; 9 if(y) 10 { 11 ch=getchar(); 12 while(isdigit(ch)) x+=(ch^48)*t,t*=0.1,ch=getchar(); 13 } 14 return w?-x:x; 15 }
(2)快輸
1.整數輸出(需要呼叫 <iostream> <cstdio> )
1 inline void write(int x) 2 { 3 if(x<0) 4 { 5 putchar('-'); 6 x=-x; 7 } 8 if(x>9) write(x/10); 9 putchar(x%10+'0'); 10 }
2.浮點數輸出(暫無)