第一步 打开文件->首选项->配置用户代码片段

第二步 点击配置全局代码片段文件

第三步 编写自己的码代码补全

{
    // Place your 全局 snippets here. Each snippet is defined under a snippet name and has a scope, prefix, body and 
    // description. Add comma separated ids of the languages where the snippet is applicable in the scope field. If scope 
    // is left empty or omitted, the snippet gets applied to all languages. The prefix is what is 
    // used to trigger the snippet and the body will be expanded and inserted. Possible variables are: 
    // $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders. 
    // Placeholders with the same ids are connected.
    "Print to console": {
        "scope": "cpp",
        "prefix": "#include<bits/stdc++.h>",
        "body": [
            "#include <bits/stdc++.h>",
            "#define endl '\\n'",
            "#define int long long",
            "",
            "using namespace std;",
            "",
            "typedef pair<int, int> PII;",
            "",
            "const int N = 1e5 + 10, M = 2e5 + 10, INF = 0x3f3f3f3f3f3f3f3f;",
            "",
            "int n, m;",
            "int a[N];",
            "",
            "void solve()",
            "{",
            "    cin >> n >> m;",
            "}",
            "",
            "signed main()",
            "{",
            "    ios::sync_with_stdio(false);",
            "    cin.tie(nullptr);",
            "    cout.tie(nullptr);",
            "",
            "    //int T;",
            "    // cin >> T;",
            "    //while (T--)",
            "        solve();",
            "",
            "    return 0;",
            "}"
        ],
        "description": "cpp 代码自动补全"
    }
}

第四步 保存文件

测试 成功