how to pass a string by reference in c++
#include <iostream>
using namespace std;
void func (string &s)
{
s+="d";
}
int main()
{
string a="abc";
func(a);
cout << a << endl;
return 0;
}
// output will be abcdhow to pass a string by reference in c++
#include <iostream>
using namespace std;
void func (string &s)
{
s+="d";
}
int main()
{
string a="abc";
func(a);
cout << a << endl;
return 0;
}
// output will be abcdpassing reference in c++
// C++ program to demonstrate differences between pointer
// and reference.
#include <iostream>
using namespace std;
struct demo
{
int a;
};
int main()
{
int x = 5;
int y = 6;
demo d;
int *p;
p = &x;
p = &y; // 1. Pointer reintialization allowed
int &r = x;
// &r = y; // 1. Compile Error
r = y; // 1. x value becomes 6
p = NULL;
// &r = NULL; // 2. Compile Error
p++; // 3. Points to next memory location
r++; // 3. x values becomes 7
cout << &p << " " << &x << endl; // 4. Different address
cout << &r << " " << &x << endl; // 4. Same address
demo *q = &d;
demo &qq = d;
q->a = 8;
// q.a = 8; // 5. Compile Error
qq.a = 8;
// qq->a = 8; // 5. Compile Error
cout << p << endl; // 6. Prints the address
cout << r << endl; // 6. Print the value of x
return 0;
}Copyright © 2021 Codeinu
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