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字符串专题1(PAT)：

1.A + B format

A+B format

 

2.Spell It Right

Spell It Right

 

3.Sign In and Sign Out

Sign In and Sign Out

 

4.Password

Password

 

5.Boys vs Girls

Boys vs Girls

 

6.String Subtraction

String Subtraction

 

7.Speech Patterns

Speech Patterns

 

8.Dating

Dating

 

9.Phone Bills

Phone Bills

 

10.Queueing at Bank

Queueing at Bank

 

AC代码:

1.A + B format

# include <bits/stdc++.h>
using namespace std;

string cal(int c){
  int k = c;

  if (c == 0) return "0";

  string ans;

  while (k){
    ans += (k % 10) + '0';
    k /= 10;
  }

  string res;

  for (int i = 0; i < ans.size(); ++i){
    res += ans[i];

    if (i % 3 == 2 && i != ans.size() - 1){
      res += ",";
    }
  }

  reverse(res.begin(),res.end());
  return res;

}
int main (void){
  int a,b;
  cin >> a >> b;

...