C++ Functions Parameters C-PLUS-PLUS
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C++ Functions Parameters
C++ Functions Parameters
Information can be passed to functions as a parameter. Parameters act as variables inside the function.
Syntax
// code to be executed
}
Example
#include <iostream>
#include <string>
using namespace std;void myFunction(string fname) {
cout << fname << " Chahar\n";
}int main() {
myFunction("Deepak");
myFunction("Miss Meenkashi");
myFunction("Ajay");
return 0;
}
Output:
Deepak Chahar
Miss Meenakshi Chahar
Ajay Chahar
When a parameter is passed to the function, it is called an argument. So, from the example above: fname is a parameter, while Deepak, Miss Meenakshi and Ajay are arguments.
Default Parameter Value
You can also set a default parameter value, by using the equals sign (=). If we call the function without an argument, it uses the default value.
Example
#include <iostream>
#include <string>
using namespace std;void myFunction(string country = "Canada") {
cout << country << "\n";
}int main() {
myFunction("Rusia");
myFunction("India");
myFunction();
myFunction("USA");
return 0;
}
Output:
Rusia
India
Canada
USA
Multiple Parameters
You can add as many parameters as you want. Separate each with a comma ,
Example
#include <iostream>
#include <string>
using namespace std;void myFunction(string fname, int age) {
cout << fname << " Chahar. " << age << " years old. \n";
}int main() {
myFunction("Deepak", 22);
myFunction("Miss Meenakshi", 24);
myFunction("Ajay", 19);
return 0;
}
Output:
Deepak Chahar. 22 years old.
Miss Meenakshi. 24 years old.
Ajay Chahar. 19 years old.
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