Replace PI Solution Added

Author: akashmodak97

Hacker Blocks/Replace PI.cpp

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+/* Hacker Blocks */
+/* Title - Replace PI */
+/* Created By - Akash Modak */
+/* Date - 06/07/2020 */
+
+// Replace all occurrences of pi with 3.14
+
+// Input Format
+// Integer N, no of lines with one string per line
+
+// Constraints
+// 0 < N < 1000
+// 0 <= len(str) < 1000
+
+// Output Format
+// Output result one per line
+
+// Sample Input
+// 3
+// xpix
+// xabpixx3.15x
+// xpipippixx
+// Sample Output
+// x3.14x
+// xab3.14xx3.15x
+// x3.143.14p3.14xx
+// Explanation
+// All occurrences of pi have been replaced with "3.14".
+
+#include<iostream>
+using namespace std;
+void replacepi(char *a,int i){
+	if(a[i]=='\0' or a[i+1]=='\0')
+	return;
+	if(a[i]=='p' and a[i+1]=='i'){
+		int j=i;
+		while(a[j]!='\0')
+		j++;
+		while(j>=i+2){
+			a[j+2]=a[j];
+			j--;
+		}
+		a[i]='3';
+		a[i+1]='.';
+		a[i+2]='1';
+		a[i+3]='4';
+		replacepi(a,i+4);
+	}
+	else
+	replacepi(a,i+1);
+}
+int main() {
+	int t;
+	cin>>t;
+	while(t--){
+	char a[1000];
+	cin>>a;
+	// int n = strlen(a);
+	replacepi(a,0);
+	cout<<a<<endl;
+	}
+	return 0;
+}