Strings – Let us C

Substring Extraction

Pravesh Agrawal — Sat, 02 Dec 2023 11:05:29 +0000

#include 
#include 

int main() {
    // Substring extraction
    char text[] = "Programming is fun";
    char substring[10];

    strncpy(substring, text + 13, 3); // Extract "fun"
    substring[3] = '\0'; // Null-terminate the substring

    printf("Original Text: %s\n", text);
    printf("Extracted Substring: %s\n", substring);

    return 0;
}

String Copy

Pravesh Agrawal — Sat, 02 Dec 2023 11:05:05 +0000

#include 
#include 

int main() {
    // String copy
    char source[] = "Hello, World!";
    char destination[20];

    strcpy(destination, source);

    printf("Source: %s\n", source);
    printf("Destination: %s\n", destination);

    return 0;
}

String Comparison

Pravesh Agrawal — Sat, 02 Dec 2023 11:04:45 +0000

#include 
#include 

int main() {
    // String comparison
    char str1[] = "apple";
    char str2[] = "orange";

    if (strcmp(str1, str2) == 0) {
        printf("The strings are equal.\n");
    } else {
        printf("The strings are not equal.\n");
    }

    return 0;
}

String Concatenation

Pravesh Agrawal — Sat, 02 Dec 2023 11:04:25 +0000

#include 
#include 

int main() {
    // String concatenation
    char firstName[20] = "John";
    char lastName[20] = "Doe";
    char fullName[40];

    strcpy(fullName, firstName); // Copy the first name to the full name
    strcat(fullName, " ");      // Concatenate a space
    strcat(fullName, lastName);  // Concatenate the last name

    printf("Full Name: %s\n", fullName);

    return 0;
}

String Length Calculation

Pravesh Agrawal — Sat, 02 Dec 2023 11:04:02 +0000

#include 
#include 

int main() {
    // String length calculation
    char text[100];

    printf("Enter a string: ");
    scanf("%s", text);

    int length = strlen(text);
    printf("Length of the string: %d\n", length);

    return 0;
}

String Input and Output

Pravesh Agrawal — Sat, 02 Dec 2023 11:03:39 +0000

#include 

int main() {
    // String input and output
    char name[50];

    printf("Enter your name: ");
    scanf("%s", name);

    printf("Hello, %s!\n", name);

    return 0;
}