Description about Program to Replace substring in a string
Get a string as input from the user and then get another string which has to be removed from the string. Get the third input, the new substring which is placed in that substring position. Finally print the output by replacing the substring with new string.
Input
Enter a string
talentbattle
Enter the substring to be removed:
talent
Enter the new substring:
student
Output
The new string:
studentbattle
C Program to Replace substring in a string
#include <stdio.h>
#include <string.h>
void replace(char str[],char sub[],char nstr[])
{
int strLen,subLen,nstrLen;
int i=0,j,k;
int flag=0,start,end;
strLen=strlen(str);
subLen=strlen(sub);
nstrLen=strlen(nstr);
for(i=0;i<strLen;i++)
{
flag=0;
start=i;
for(j=0;str[i]==sub[j];j++,i++)
if(j==subLen-1)
flag=1;
end=i;
if(flag==0)
i-=j;
else
{
for(j=start;j<end;j++)
{
for(k=start;k<strLen;k++)
str[k]=str[k+1];
strLen--;
i--;
}
for(j=start;j<start+nstrLen;j++)
{
for(k=strLen;k>=j;k--)
str[k+1]=str[k];
str[j]=nstr[j-start];
strLen++;
i++;
}
}
}
}
int main()
{
char str[20],sub[20],nstr[50];
printf("Enter a string: ");
scanf("%s",str);
printf("Enter the substring to be removed: ");
scanf("%s",sub);
printf("Enter the new substring: ");
scanf("%s",nstr);
replace(str,sub,nstr);
printf("The new string: %s",str);
return 0;
}
C++ Program to Replace substring in a string
#include <iostream>
#include <string.h>
using namespace std;
void replace(char str[],char sub[],char nstr[])
{
int strLen,subLen,nstrLen;
int i=0,j,k;
int flag=0,start,end;
strLen=strlen(str);
subLen=strlen(sub);
nstrLen=strlen(nstr);
for(i=0;i<strLen;i++)
{
flag=0;
start=i;
for(j=0;str[i]==sub[j];j++,i++)
if(j==subLen-1)
flag=1;
end=i;
if(flag==0)
i-=j;
else
{
for(j=start;j<end;j++)
{
for(k=start;k<strLen;k++)
str[k]=str[k+1];
strLen--;
i--;
}
for(j=start;j<start+nstrLen;j++)
{
for(k=strLen;k>=j;k--)
str[k+1]=str[k];
str[j]=nstr[j-start];
strLen++;
i++;
}
}
}
}
int main()
{
char str[20],sub[20],nstr[50];
cout<<"Enter a string: ";
cin>>str;
cout<<"Enter the substring to be removed: ";
cin>>sub;
cout<<"Enter the new substring: ";
cin>>nstr;
replace(str,sub,nstr);
cout<<"The new string: "<<str<<endl;
return 0;
}
Java Program to Replace substring in a string
import java.util.Scanner;
public class Main
{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter a string: ");
String str = sc.nextLine();
System.out.print("Enter the string to be removed: ");
String sub = sc.nextLine();
System.out.print("Enter the new string: ");
String newstr =sc.nextLine();
String repstr = str.replace(sub, newstr);
System.out.println("New String is :"+repstr);
}
}
Python Program to Replace substring in a string
Str=input("Enter a string: ")
sub=input("Enter string to be removed: ")
nstr=input("Enter ne string: ")
Str=Str.replace(sub,nstr)
print("New string: ")
print(Str)
