Strings Concatenation in C++

This is a C++ Program to Concatenate two C-Style strings.

Problem Description

The program takes two strings and concatenates them, as in links them together.

Problem Solution

1. The program takes two strings initially.
2. Using string function, the two strings are concatenated.
3. The concatenated string is printed.
4. Exit.

C++ Program/Source code

Here is the source code of C++ Program to Concatenate Two Strings. The program output is shown below.

```
#include <iostream>
```
```
#include <string.h>
```
```
using namespace std;
```
```
int main ()
```
```
{
```
```
    char str1[50], str2[50];
```
```
    cout << "Enter string 1 : ";
```
```
    gets(str1);
```
```
    cout << "Enter string 2 : ";
```
```
    gets(str2);
```
```
    strcat(str1, str2);
```

    cout << "Concatenated String : " << str1;

```
    return 0;
```
```
}
```

Program Explanation

1. The user is asked to enter two strings. They are stored in the character variables ‘str1′ and str2’.
2. Using ‘strcat()’, which is an inbuilt function under the library ‘string.h’, the two strings are concatenated.
3. The concatenated string is stored in str1.
4. The result is then printed.

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Runtime Test Cases

Case 1 :
Enter string 1 : Hello
Enter string 2 :  World
Concatenated String : Hello World
 
Case 2 :
Enter string 1 : 24
Enter string 2 : 68
Concatenated String : 2468
 
Case 3 :
Enter string 1 : C++
Enter string 2 : Programming
Concatenated String : C++Programming

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