Question

void reverse_in_place(string& s){
int last = s.length() -1;
for (int i = 0; i <= last/2; i++){
char temp = s[i]; //i is initially 0
s[i] = s[last-1]; //swapping first and last character
s[last- i] = temp;
}
}

This is a c++ program.

convert the same function for array and vectors.

Answer 1

//The required function for vectors:

void reverse_in_place_vector( vector <int> &v){ //passing vector to function
int last = v.size() - 1;
for (int i=0; i <= last ; i++ )
    {
        int temp = v[i]; // i is initially zero
        v[i] = v[last]; // swapping first and last character
        v[last] = temp;
        last--;
    }

  
}

//The required function for arrays:

void reverse_in_place_array( int a[] , int n){ // passing array and its size n to function
   int last = n - 1;
    for (int i=0; i <= last ; i++ )
    {
        int temp = a[i];
        a[i] = a[last];
        a[last] = temp;
        last--;
    }

}

Please refer to the screenshot of the code to understand the indentation of the code:

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