C++ Pass Structures to a Function
Pass Structure to a Function
You can also pass a structure to a function.
This is useful when you want to work with grouped data inside a function:
Example
struct Car {
string brand;
int year;
};
void myFunction(Car
c) {
cout << "Brand: " << c.brand << ", Year: " << c.year << "\n";
}
int main() {
Car myCar = {"Toyota", 2020};
myFunction(myCar);
return 0;
}
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Note: Since the structure is passed by value, the function gets a copy of the structure.
This means that the original data is not changed.
Pass by Reference
You can also pass a structure by reference, using &.
This allows the function to modify the original data:
Example
struct Car {
string brand;
int year;
};
void updateYear(Car& c) {
c.year++;
}
int main() {
Car myCar = {"Toyota", 2020};
updateYear(myCar);
cout << "The " << myCar.brand << " is now from
year " << myCar.year << ".\n";
return 0;
}
Try it Yourself »
Tip: Use reference if you want the function to change the structure's data, or to avoid copying large structures.
