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Modifying Data Using Pointers in C++

Pointers can be used to modify the data of the variables they point to. This is commonly used when passing pointers to functions to allow direct modification of arguments.

Example: Modifying a Variable Using a Pointer

#include <iostream>

void updateValue(int *ptr) {
    *ptr = 50;
}

int main() {
    int age = 25;
    updateValue(&age);
    std::cout << "Updated age: " << age << std::endl;
    return 0;
}

Explanation: The function updateValue takes a pointer as an argument and modifies the value at that memory location. In this case, age is updated to 50.

Key Takeaways

  • Pointers allow for modification of variable values indirectly.
  • Useful in functions to modify arguments without returning them explicitly.
  • Provides efficient ways to manipulate data directly in memory.
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