c++设置左对齐

方法一：

cout.flags (ios::left);//设置对齐的标志位为左

2. cout<<left 

对齐选项：(left, right or internal).

manip setw ( int n );默认右对齐

setw(n) 设置固定宽度

Set field width

Sets the number of characters to be used as the field width for the next insertion operation.

smanip setfill ( char c );

// setfill example
#include <iostream>
#include <iomanip>
using namespace std;

int main () {
  cout << setfill ('x') << setw (10);
  cout << 77 << endl;
  return 0;
}

This code uses setfill to set the fill character to 'x'. The output of this example is something similar to:

xxxxxxxx77

想要输出77********

cout<<left<<setw(10)<<setfill('x') 左对齐