调用C 字典的功能图

我正在开发一个C 字典，我制作了一个函数图来搜索单词。

该程序提示用户选择"搜索一个单词"或"添加新单词"。

问题：我制作了一张函数地图，如果用户选择搜索一个单词，则将调用，但该程序似乎并没有调用该函数。

我是map的新手，并且以前从未使用过，一些帮助很棒。

#include <iostream>
#include <map>
using namespace std; 
//map of function to search for word
map <string, int> search_word(map<string, int> &word_bank, int val)
{
    string word;
    cout<<"Search word: "<<endl;
    cin>>word;
    if(word_bank.find(word) != word_bank.end())
    cout<<word<<endl;
    else if (word_bank.find(word) == word_bank.end())
    cout<<"word not found";
}
int main()
{
    int choice;
    map <string, int> word_bank;
    word_bank["diingati"] = 0;
    word_bank["diperbuat"] = 1;
    word_bank["keibuan"] = 2;
    word_bank["kepercayaan"] = 3;
    word_bank["menggunakan"] = 4;
    word_bank["mempergunakan"] = 5;

    cout<<"***"<<" Welcome to C++ Malay Dictionary "<<"***"<<endl<<endl;
    cout<<"Do you want to search for a word or enter a new word? "<<endl<<endl;
    cout<<"Search : 1"<<endl<<"Enter new word: 2"<<endl<<endl;
    cin>>choice;
    if (choice == 1)
    map <string, int> search_word; //calling the function

    else
    cout<<"Please enter a number: ";
    cin>>choice;
}