Question

I have a char memory[1024]. I want to write the string "mike" into the memory starting from an index. I also need a function to move "mike" to another index in the same memory swapping m and k in mike. Basically, i need a function to write to memory and a function to move the string to an index. Thank you

In c++ please.

Answer 1

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Please look at my code and in case of indentation issues check the screenshots.

---------main.cpp---------------

#include <iostream>
#include <string.h>
using namespace std;

//this function intializes the memory with _, you can choose to intialize it with any letter you want.
void initialize_memory(char memory[], int size)
{
   for(int i = 0; i < size; i++){
       memory[i] = '_';
   }
}

void writeString(char memory[], int size, int index, char *str)
{
   for(int i = 0; i < strlen(str); i++)   //writes the string at the specified index
   {
       if(index < size){
           memory[index] = str[i];   //copies each character one by one
           index++;
       }
   }
}

void moveString(char memory[], int size, int oldindex, int newindex)
{
   int i = oldindex;  
   char temp[size];       //temporary array to read the string and store its copy
   int j = 0;
   while(memory[i] != '\0'){
       temp[j] = memory[i];   //copy each character of the old string from the memory
       i++;
       j++;
   }
   temp[j] = '\0';           //terminate the string with null character, to denote the end of string

   initialize_memory(memory, size);   //reinitialize memory
   writeString(memory, size, newindex, temp);   //write the string at newindex, the string is in temp array
}

int main()
{
   int size = 1024;
   char memory[size];    //declare a character array memory of size 1024

   initialize_memory(memory, size);   //initialize the memory with _ at every index
  
   int index;
   cout << "At which index do you want to write the string: ";       //ask the user where they want to write the string in memory
   cin >> index;

   writeString(memory, size, index, (char *)"mike");   //write the string at the memory specified by the user
   cout << "Memory:\n" << memory << endl;               //print the memory array

   int oldindex = index;   //store the location of the index, where we wrote the string
   int newindex;          
   cout << "\nAt which index do you want to move the string: "; //ask the user another index, where they want to move the string
   cin >> newindex;                          

   moveString(memory, size, oldindex, newindex);   //move the string the location specified by the user
   cout << "Memory:\n" << memory << endl;               //print the memory array
   return 0;
}

----------Screenshots--------------


----------Output--------------

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