题解 | 字符串替换

#include <algorithm>
class StringFormat {
public:
    string formatString(string A, int n, vector<char> arg, int m) {
        string ans;
        int count=0;
        int i=0;int len=A.size();
        while(i<len){
            if(A[i]=='%'){
                ans.push_back(arg[count++]);
                i+=2;
            }
            else{
                ans.push_back(A[i]);
                i++;
            }
        }
        while(count<m){
            ans.push_back(arg[count++]);
        }
        return ans;
    }
};