Replacepr(((((()))))))

#1

Why x is not getting included in my input???
#include
using namespace std;

void replacepi(char *a,int i){
//base case
if(a[i]==’\0’ || a[i+1]==’\0’){
return;
}

//recursive case
if(a[i]=='p' and a[i+1]=='i'){
	int j = i+2;
	while(a[j]!='\0'){
		j++;
	}

	while(j>=i+2){
		a[j+2]=a[j];
		j--;
	}

	//copying the 3.14
	a[i] = '3';
	a[i+1] = '.';
	a[i+2] = '1';
	a[i+3] = '4';

	//recursion to solve for the smaller arr
	replacepi(a,i+4);
}
else{
	replacepi(a,i+1);
}

}
int main() {
int n;
cin>>n;
while(n>0){
char a[1000];
cin.get();
cin.getline(a,1000);

	replacepi(a,0);

	cout<<a<<endl;

	n--;


}


return 0;

}

#2

hi @abhinavssr2003_eab0717682969e5c
refer this–>

#include<iostream>
using namespace std;
void solve(char ch[], int i, char out[], int j) {
	if (ch[i] == '\0') {
		cout << out << endl;
		return;
	}

	if (ch[i] == 'p' && ch[i+1] == 'i') {
		out[j] = '3';
		out[j + 1] = '.';
		out[j + 2] = '1';
		out[j + 3] = '4';
		solve(ch, i + 2, out, j + 4);
	} else {
		out[j] = ch[i];
		solve(ch, i + 1, out, j + 1);
	}
}
int main() {
	int t;
	cin >> t;
	while (t--) {
		// take input
		char ch[10000], out[10000];
		cin >> ch;

		// print output corresponding to given input
		solve(ch, 0, out, 0);
	}

	return 0;
}
#3

please tell me the mistake in my code

#4

hey, your corrected code–>

#include <iostream>
#include <cstring>
using namespace std;

void replace(char *a, int i)
{
    // base case
    if (a[i] == '\0' || a[i + 1] == '\0')
    {
        return;
    }

    // recursive case
    if (a[i] == 'p' && a[i + 1] == 'i')
    {
        int j = i + 2;
        while (a[j] != '\0')
        {
            j++;
        }
        while (j >= i + 2)
        {
            a[j + 2] = a[j];
            j--;
        }

        // copy the pi
        a[i] = '3';
        a[i + 1] = '.';
        a[i + 2] = '1';
        a[i + 3] = '4';

        replace(a, i + 4);
    }
    else
    {
        replace(a, i + 1);
    }
}

int main()
{

    int n;
    cin >> n;
    char a[1000];
    cin.get();
    while (n > 0)
    {
        cin.getline(a, 1000);

        replace(a, 0);

        cout << a << endl;

        n--;
    }
}
#5

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