Question

Write a recursive C++ function writeLine(ch,n) that writes a character repeatedly to form a line of n characters. For example, writeLine('*', 5) produces the line *****.

2. Now write a iterative function writeBlock (ch,n,m) that uses writeLine(ch, n) to write m lines of n characters each. For example, writeBlock('*', 5, 3) produces the output

*****

*****

*****

3. provide a main() function for testing, if time and space allowed.

Answer 1

C++ program :-

#include <iostream>

using namespace std;

int writeLine(char ch, int num)
{
    if(num==0)
        return 0;
      
    printf("%c",ch);
    return writeLine(ch,num-1);
}

void writeBlock(char ch, int char_count, int line_count)
{
    for(int i=0;i<line_count;i++)
    {
        writeLine(ch,char_count);
        printf("\n");
    }
}

int main() {
    writeBlock('*',5,3);
}

Output :-