MIT-Curricular/DS/C/Lab/Week2/StringHandling.c

#include <stdio.h>

int string_length(char string[])
{
    int i;
    for(i=0; string[i]!='\0'; i++);
    return i;
}

void string_concat(char str1[], char str2[])
{
    int i,j;
    char str5[100];

    for(i=0;str1[i]!='\0';i++)
        str5[i]=str1[i];

    str5[i] = '\0';

    for(i=string_length(str5),j=0;str2[j]!='\0';i++,j++)
        str5[i]=str2[j];

    str5[i] = '\0';

    printf("Joining Strings 1 and 2, we get: %s\n",str5);
}

void string_comp(char str1[], char str2[])
{
    int i;

    for(i=0;str1[i]!='\0' || str2[i]!='\0' ;i++){
        if(str1[i]>str2[i]){
            printf("The first string is greater than the second.\n");
            break;
        }else if(str1[i]<str2[i]){
            printf("The second string is greater than the first.\n");
            break;
        }
    }
}

void string_insert(char str1[], char str2[], int pos)
{
    int i,j;
    char str6[100];

    if(pos > string_length(str1)){
        printf("Invalid Position.");
        return;

    }else{

        for(i=0;i<pos;i++){
            str6[i]=str1[i];
        }

        for(i=pos,j=0;str2[j]!='\0';i++,j++){
            str6[i]=str2[j];
        }

        for(i=pos+string_length(str2),j=pos;str1[j]!='\0';i++,j++){
            str6[i]=str1[j];
        }

        str6[i]='\0';

        printf("The new modified string is: %s \n", str6);

        }
}

void string_destroy(char str1[], char str3[], int pos)
{
    int i, j, str3_len = string_length(str3);

    if (pos < 0 || pos >= string_length(str1)) {
        printf("Invalid Position.\n");
        return;
    } else if (str3_len > string_length(str1 + pos)) {
        printf("Deletion substring is too long.\n");
        return;
    } else {
        for (i = pos, j = 0; j < str3_len; i++, j++) {
            if (str1[i] != str3[j]) {
                printf("The substring doesn't match.\n");
                return;
            }
        }
        for (i = pos; str1[i + str3_len] != '\0'; i++) {
            str1[i] = str1[i + str3_len];
        }
        str1[i] = '\0';
    }
}

void main()
{
    int a,b;
    char str1[100],str2[100],str3[100];

    printf("Enter the first string: ");
    gets(str1);

    printf("Enter the second string: ");
    gets(str2);

    printf("The first string is %s. \n",str1);
    printf("The second string is %s. \n",str2);

    // String Length

    printf("The length of String 1 is %d. \n",string_length(str1));
    printf("The length of String 2 is %d. \n",string_length(str2));

    // String Concatenation

    string_concat(str1, str2);

    // String Comparison

    string_comp(str1, str2);

    // String Insertion

    printf("Enter the position at which you would like to insert string 2 into string 1: ");
    scanf("%d",&a);

    string_insert(str1, str2, a);

    printf("Enter the position at which you would like to check for deletion substring: ");
    scanf("%d",&b);

    printf("Enter the part of the string that you want to delete from string 1: ");
    getchar(); // Clear the newline character from the input buffer
    fgets(str3, sizeof(str3), stdin); // Use fgets instead of gets for safer input

    string_destroy(str1, str3, b);
}