在C ++中显示餐厅的食物订单表
假设我们有一个数组订单，它代表顾客在餐厅里完成的订单。因此，orders[i]=[cust_namei，table_numi，food_itemi]，其中cust_namei是客户名称，table_numi是客户表号，而food_itemi是商品客户订单。
我们必须退还餐厅的“展示桌”。这里的“显示表”是一个表，其行条目表示每个表订购的每种食品有多少。第一列为表格编号，其余各列按字母顺序对应于每个食品。第一行应为标题，其第一列为“表格”，然后是食品名称。
因此，如果输入像orders= [["Amal","3","Paratha"],["Bimal","10","Biryni"],["Amal","3","Fried Chicken"],["Raktim","5","Water"],["Raktim","5","Paratha"],["Deepak","3","Paratha"]]，则输出将是[["Table","Biryni","FriedChicken","Paratha","Water"],["3","0","1","2","0"],["5","0","0","1","1"],["10","1","0","0","0"]]]]
例
让我们看下面的实现以更好地理解-
#include <bits/stdc++.h>
using namespace std;
void print_vector(vector<vector<string> > v){
cout << "[";
for(int i = 0; i<v.size(); i++){
cout << "[";
for(int j = 0; j <v[i].size(); j++){
cout << v[i][j] << ", ";
}
cout << "],";
}
cout << "]"<<endl;
}
typedef long long int lli;
class Solution {
public:
vector <string> split(string& s, char delimiter){
vector <string> tokens;
string token;
istringstream tokenStream(s);
while(getline(tokenStream, token, delimiter)){
tokens.push_back(token);
}
return tokens;
}
static bool cmp(vector <string>& a, vector <string>& b){
lli an = stol(a[0]);
lli bn = stol(b[0]);
return an < bn;
}
vector<vector<string>> displayTable(vector<vector<string>>& o) {
map <string, map < string, int> >m;
set <string> names;
set <string> t;
for(auto &it : o){
t.insert(it[1]);
bool ok = true;
if(!ok){
vector <string> v = split(it[2], ' ');
for(auto& x : v){
m[it[1]][x]++;
names.insert(x);
}
}
else{
m[it[1]][it[2]]++;
names.insert(it[2]);
}
}
vector < vector <string> > ret;
vector <string> temp(names.begin(), names.end());
temp.insert(temp.begin(), "Table");
ret.push_back(temp);
for(auto& it : t){
vector <string> te;
te.push_back(it);
for(auto& x : names){
te.push_back(to_string(m[it][x]));
}
ret.push_back(te);
}
sort(ret.begin() + 1, ret.end(), cmp);
return ret;
}
};
main(){
Solution ob;
vector<vector<string>> v = {{"Amal","3","Paratha"},{"Bimal","10","Biryni"},{"Amal","3","Fried
Chicken"},{"Raktim","5","Water"},{"Raktim","5","Paratha"},{"Deepak"," 3","Paratha"}};
print_vector(ob.displayTable(v));
}输入值
{{"Amal","3","Paratha"},{"Bimal","10","Biryni"},{"Amal","3","Fried Chicken"},{"Raktim","5","Water"},{"Raktim","5","Paratha"},{"Deepak"," 3","Paratha"}}输出结果
[[Table, Biryni, Fried Chicken, Paratha, Water, ],[3, 0, 1, 2, 0, ],[5, 0, 0, 1, 1, ],[10, 1, 0, 0, 0, ],]