Capture by Reference [&]

Easy Lambda Expressions

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Problem Statement

Write a C++ program using a lambda with reference capture (`[&]`) to modify an external variable in-place.

Input Format

Initial balance and deposit amount.

Output Format

Print updated balance.

Constraints

Balances >= 0

Sample Input

1000.0 250.5

Sample Output

1250.50

Explanation

Reference capture allows lambdas to modify outer scope variables directly.

Starter Code

#include <iostream>
#include <iomanip>

int main() {
    double balance, depositAmt;
    if (std::cin >> balance >> depositAmt) {
        // Write your reference capture lambda logic here
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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