C++ Debug Template 🛠
Simplify variable tracking across functions and loops!
As of now both perform equally well, but my choice? C++20.
This template supports datatypes such as:
🔢 Primitive: int, char, bool, long long int
etc.
📚 STL: pair, tuple, vector, set, oset, map, omap, stack, queue, priority_queue, bitset
etc.
📦 Arrays of all datatypes: int arr[], bool arr[], vector<int> adj[]
etc.
🧩 Matrix: int dp[100][200], vector<vector<bool>> vis(100, vector<bool> (200, 0))
etc.
🕗 Arrays that have been decayed or declared at runtime like int arr[n]
.
📝 Rvalue Literals like "Hello", false, 'z', isSafe(i, j), dfs(u)
.
🧱 User defined structs / classes like Point
, Node
.
🤯 Even nested datatypes like map<string, vector<pair<char, unordered_set<long long>>>> WHATTT;
.
Note: For latest updates and a colored stderr version of this template, visit my Github.
How to use it?
Let's say you have different datatypes such as:
You can debug them like this debug(var1, var2, var3, var4, ...);
If you have user defined structs / classes, you just need to make a print()
function, and use debug(...)
like you do :)
In instances where array have decayed into pointer, or you declared array at runtime, use debugArr(arr, n);
Note:
- You don't need to remove
debug(...)
statements in your code when submitting it. - On platforms like Codeforces, there's a macro called
ONLINE_JUDGE
that's defined, automatically disregarding all your debug statements. This ensures your solution will be accepted unless there's a logical error.
How to Setup?
- Copy this template into your own templates. The output will be directed to the stderr stream.
- Alternatively you can make a separate header file and include this into your template
#ifndef ONLINE_JUDGE
#include "template.cpp"
#else
#define debug(...)
#define debugArr(...)
#endif
- When using it for LeetCode uncomment
#define cerr cout
and before submitting change#ifndef
to#ifdef
to ignoredebug(...);
. For convenience, after changing it, copy it, and keep it pinned in your clipboard for repetitive use.
For Complete Beginners who need step by step tutorial (for VS Code), follow these steps:
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Edit: Looking for something unique and fun? Check out my other blog on How doing CP and GYM are Alike