In C++, string concatenation refers to combining two or more strings to create a single, unified text value. This can be done using the + operator or the append() method.
Concatenation Using + Operator
The + operator allows strings to be combined effortlessly.
Example
Here, the strings bikeBrand and bikeModel are joined using +, resulting in “Ducati Panigale V4”.
C++
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using namespace std;int main() { string bikeBrand = "Ducati "; string bikeModel = "Panigale V4"; string fullName = bikeBrand + bikeModel; // Combines the strings cout << "Motorcycle: " << fullName; return 0;}Adding Spaces During Concatenation
To ensure clarity, spaces can be included manually in the concatenation.
Example
This method creates a space between carBrand and carModel, forming “BMW M3”.
C++
using namespace std;int main() { string carBrand = "BMW"; string carModel = "M3"; string fullName = carBrand + " " + carModel; // Adds a space between the strings cout << "Car: " << fullName; return 0;}Concatenation Using append()
C++ strings are objects, and they come with built-in functions such as append() for concatenation.
Example
Here, append() merges jacketBrand and jacketType, resulting in “Dainese Leather Racing”.
C++
using namespace std;int main() { string jacketBrand = "Dainese "; string jacketType = "Leather Racing"; string fullDescription = jacketBrand.append(jacketType); // Combines the strings cout << "Jacket: " << fullDescription; return 0;}