Concatenate Two Strings in C, C++, Java and Python
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Concatenate Two Strings in C, C++, Java and Python
Program to concatenate two strings is discussed here. Two strings are obtained as input and the resultant string should be the concatenations of the two strings.
For example, String 1 = "Hello" and String 2 = "World"
The output string will be "HelloWorld."
C
// C program to concatenate two strings
#include
int main()
{
char str1[100], str2[100], i, j;
printf(“\nEnter first string: “);
scanf(“%s”, str1);
printf(“\nEnter second string: “);
scanf(“%s”, str2);
for(i = 0; str1[i] != ‘\0’; ++i);
for(j = 0; str2[j] != ‘\0’; ++j, ++i)
{
str1[i] = str2[j];
}
str1[i] = ‘\0’;
printf(“Resultant string : %s”, str1);
return 0;
}
C++
// C++ program to concatenate two strings
#include
using namespace std;
int main()
{
char str1[100], str2[100], i, j;
cout << “\nEnter first string: “;
cin >> str1;
cout << “\nEnter second string: “;
cin >> str2;
for(i = 0; str1[i] != ‘\0’; ++i);
for(j = 0; str2[j] != ‘\0’; ++j, ++i)
{
str1[i] = str2[j];
}
str1[i] = ‘\0’;
cout << “Resultant string : ” << str1>
return 0;
}
JAVA
// Java program to concatenate two strings
import java.util.*;
public class Main
{
public static void main(String args[])
{
String str1, str2;
System.out.print(“\nEnter first string : “);
Scanner sc = new Scanner(System.in);
str1 = sc.nextLine();
System.out.print(“\nEnter second string : “);
str2 = sc.nextLine();
System.out.println(“Resultant string : ” + str1+str2);
}
}
PYTHON 3
# Python program to concatenate two strings
s1 = input(“Enter first string : “)
s2 = input(“Enter second string ” )
print(“Resultant string : “,end = “”)
print(s1+s2)
Output
Input- Enter first string: Hello Enter second string: World! Output- Resultant string:HelloWorld!
Concatenating two strings using pointers
C
// C program to merge two strings using pointers
#include
int main()
{
char str1[100], str2[100];
printf(“\nEnter the first string : “);
gets(str1);
printf(“\nEnter the second string : “);
gets(str2);
char *a = str1;
char *b = str2;
while(*a)
{
a++;
}
while(*b)
{
*a = *b;
b++;
a++;
}
*a = ‘\0’;
printf(“\nResultant String: %s\n “, str1);
return 0;
}
C++
// C++ program to merge two strings
#include
using namespace std;
int main()
{
char str1[100], str2[100];
cout << “\nEnter the first string : “;
cin >> str1;
cout << “\nEnter the second string : “;
cin >> str2;
char *a = str1;
char *b = str2;
while(*a)
{
a++;
}
while(*b)
{
*a = *b;
b++;
a++;
}
*a = ‘\0’;
cout << “\nResultant String ” << str1>
return 0;
}
Output
Input- Enter first string: Hello Enter second string: World! Output- Resultant string: HelloWorld!
Concatenating two strings using library function
C
// C program to concatenate two strings using library functions
#include
#include
int main()
{
char str1[100], str2[100], i, j;
printf(“\nEnter first string: “);
scanf(“%s”, str1);
printf(“\nEnter second string: “);
scanf(“%s”, str2);
printf(“Resultant string : %s”, strcat(str1,str2));
return 0;
}
C++
// C++ program to concatenate two strings using library functions
#include
#include
using namespace std;
int main()
{
char str1[100], str2[100], i, j;
cout << “\nEnter first string: “;
cin >> str1;
cout << “\nEnter second string: “;
cin >> str2;
cout << “Resultant string : ” << strcat>
return 0;
}
JAVA
// Java program to concatenate two strings using library function
import java.util.*;
public class Main
{
public static void main(String args[])
{
String str1, str2;
System.out.print(“\nEnter first string : “);
Scanner sc = new Scanner(System.in);
str1 = sc.nextLine();
System.out.print(“\nEnter second string : “);
str2 = sc.nextLine();
System.out.println(“Resultant string : ” + str1.concat(str2));
}
}
Output
Input- Enter first string: Hello Enter second string: World! Output- Resultant string:HelloWorld!
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