Add String In C

In essence, strings represent a crucial data type extensively employed in coding languages for various practical uses such as text manipulation, storing information, and managing user interactions. Their flexibility and prevalence establish them as a key skill for programmers to acquire proficiency in.

Here is a sample of C programming code that showcases various uses of strings, such as text manipulation, information retention, and interaction with users.

C Code

#include <stdio.h>
#include <string.h>

int main() {
    // Text processing
    char str1[] = "Hello, World!";
    char str2[] = "How are you today?";
    int length = strlen(str1);
    printf("The length of str1 is: %d\n", length);

    // Data storage
    char name[50];
    printf("What is your name? ");
    scanf("%s", name);
    printf("Hello, %s!\n", name);

    // User input/output
    char input[100];
    printf("Enter a line of text: ");
    fgets(input, sizeof(input), stdin);
    printf("You entered: %s\n", input);

    return 0;
}

This program showcases text manipulation by utilizing the strlen function to determine the size of the string "Hello, World!". It illustrates data retention by employing the scanf function to save the user's name in the variable name, subsequently using it to welcome the user. Lastly, it showcases user interaction by utilizing the fgets function to retrieve a line of text from the user and then displaying it on the screen.

Output

The length of str1 is: 13
What is your name? John
Hello, John!
Enter a line of text: Hi there
You entered: Hi there

Explanation:

It initially displays the character count of str1 as "Hello, World!", totaling 13 characters. Subsequently, it requests the user to supply their name, and upon receiving "John" as input, the software outputs "Hello, John!". Following this, it asks the user to type a sentence, to which the user responds with "Hi there", resulting in the program displaying "You entered: Hi there".

Add String in C

In the C programming language, you can merge two strings by employing the strcat function available in the string.h library. This function requires two parameters: the target string and the string to be appended. The content of the source string gets appended to the end of the destination string. Below is a demonstration illustrating the utilization of the strcat function:

C Code

#include <stdio.h>
#include <string.h>

int main() {
    char str1[20] = "Hello, ";
    char str2[] = "World!";
    strcat(str1, str2);
    printf("%s\n", str1);
    return 0;
}

This code snippet concatenates the string "World!" to the existing string "Hello, ", ultimately displaying "Hello, World!" on the output console.

Alternatively, you have the option to employ the "+" operator for string concatenation; however, this approach is considered inefficient since it generates a fresh string variable comprising the amalgamation of two pre-existing strings.

Output

char str1[] = "Hello, ";
char str2[] = "World!";
char str3[20];
strcpy(str3,str1);
strcat(str3,str2);
printf("%s\n", str3);

Explainaton:

This code snippet additionally appends the string "World!" to the existing string "Hello, ", producing the output "Hello, World!" on the display. It is crucial to emphasize that a sufficient memory allocation for the destination string is essential when employing the strcat function to avoid potential buffer overflow issues. The provided snippet exemplifies a C program showcasing the concatenation of two strings utilizing the strcat function available in the string.h library.

The software initially defines a pair of character arrays named "str1" and "str2" containing the strings "Hello, " and "World!", correspondingly. Subsequently, it employs the strcat function to append the content of "str2" to the end of "str1", producing the combined string "Hello, World!" within the variable "str1". Finally, the program utilizes the printf function to display the content of "str1" on the screen.

The other approach involves utilizing the "+" operator, which results in the creation of a fresh variable and is deemed inefficient. Additionally, the program employs the strcpy function for duplicating the data from one string to another. Remember that the target string must have adequate capacity to accommodate the combined string in order to prevent buffer overflow issues.