Take a String from the user and prints its all substring on the consol nput: "abc" Output: "a", "ab", "abc", "b", "bc", "c" Choose programing language as Your Own.

Solution- Taking the string from a user and print its all substring on the console as given

Input: "abc"

// C++ program to print permutations
// of a given string with spaces.
#include <cstring>
#include <iostream>
using namespace std;

/* Function recursively prints
the strings having space pattern.
i and j are indices in 'str[]' and
'buff[]' respectively */
void printPatternUtil(const char str[],
char buff[], int i,
int j, int n)
{
if (i == n)
{
buff[j] = '0円';
cout << buff << endl;
return;
}

// Either put the character
buff[j] = str[i];
printPatternUtil(str, buff, i + 1, j + 1, n);

// Or put a space followed by next character
buff[j] = ' ';
buff[j + 1] = str[i];

printPatternUtil(str, buff, i + 1, j + 2, n);
}

// This function creates buf[] to
// store individual output string and uses
// printPatternUtil() to print all permutations.
void printPattern(const char* str)
{
int n = strlen(str);

// Buffer to hold the string
// containing spaces
// 2n - 1 characters and 1 string terminator
char buf[2 * n];

// Copy the first character as
// it is, since it will be always
// at first position
buf[0] = str[0];

printPatternUtil(str, buf, 1, 1, n);
}

// Driver program to test above functions
int main()
{
const char* str = "abc";
printPattern(str);
return 0;
}

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