C++的输入与输出和格式化输出

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#include <iostream>

#include <iomanip>

usingnamespacestd;

intmain()

{

printf("%c\n%d\n%f\n",'a',100,120.00);

printf("%5c\n%5d\n%6.2f\n",'a',100,120.00);

cout

<<setw(5)<<'a'<<endl

<<setw(5)<<100<<endl

<<setprecision(2)<<setiosflags(ios::fixed)<<120.00<<endl;

return0;

}

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#include <iostream>

#include <iomanip>

usingnamespacestd;

intmain()

{

inti = 123;

cout<<i<<endl;

cout<<dec<<i<<endl;

cout<<hex<<i<<endl;

cout<<oct<<i<<endl;

cout<<setbase(16)<<i<<endl;

return0;

}

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#include <iostream>

#include <iomanip>

usingnamespacestd;

intmain()

{

cout<<setw(10)<<1234<<endl;

cout<<setw(10)<<setfill('0')<<1234<<endl;

cout<<setw(10)<<setfill('0')<<setiosflags(ios::left)<<1234<<endl;

cout<<setw(10)<<setfill('-')<<setiosflags(ios::right)<<1234<<endl;

return0;

}