commit a6240fb1f9421159bb1f7251ea60269a01fecb3e
parent ab5cea2d37303ae4b43b44d63b7448b90b1b6dee
Author: Amit Dutta <amitdutta4255@gmail.com>
Date: Sat, 20 Dec 2025 13:36:01 +0530
[2025-12-20] .\assignment-secondary\assignment-s-14.c : Files for assignment-14 from second assignment file.
Diffstat:
2 files changed, 640 insertions(+), 0 deletions(-)
diff --git a/assignment-secondary/assignment-s-14.c b/assignment-secondary/assignment-s-14.c
@@ -0,0 +1,311 @@
+/*
+ * ======================================================================================
+ * COPYRIGHT (C) 2025 AMIT DUTTA. ALL RIGHTS RESERVED.
+ * ======================================================================================
+ * Repository: https://github.com/notamitgamer
+ * Author : Amit Dutta
+ * License : EDUCATIONAL SOURCE-AVAILABLE LICENSE (ESAL-1.0)
+ * ======================================================================================
+ *
+ * [ IMPORTANT LEGAL NOTICE ]
+ *
+ * 1. PROPRIETARY STATUS:
+ * This software ("The Software") is the intellectual property of Amit Dutta.
+ * It is NOT "Open Source" in the traditional sense. It is "Source-Available"
+ * for educational observation only.
+ *
+ * 2. ACADEMIC INTEGRITY & RESTRICTION:
+ * The use of this code, in whole or in part, for the purpose of submitting
+ * academic assignments, projects, lab reports, or examinations at
+ * WEST BENGAL STATE UNIVERSITY (WBSU) or any other educational institution
+ * is STRICTLY PROHIBITED.
+ *
+ * >>> VIOLATION OF THIS CLAUSE WILL BE REPORTED AS ACADEMIC MISCONDUCT. <<<
+ *
+ * 3. PERMISSIONS:
+ * You are granted a revocable license to:
+ * - Read and study the code to understand algorithms.
+ * - Compile and run the code locally for personal testing.
+ *
+ * 4. NO WARRANTY:
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
+ *
+ * ======================================================================================
+ */
+
+/*
+ Write a menu-driven program to perform the following string operations:
+ a. Show address of each character
+ b. Concatenate two strings without using strcat()
+ c. Concatenate two strings using strcat()
+ d. Compare two strings
+ e. Find string length using pointers
+ f. Convert lowercase to uppercase
+ g. Convert uppercase to lowercase
+ h. Count number of vowels
+ i. Reverse the string
+*/
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+
+void address_char(char *);
+void concat_manual(char[], char[]);
+void concat_strcat(char[], char[]);
+int string_cmp(char *, char *);
+int string_len(char *);
+void ltou(char[]);
+void utol(char[]);
+int vowel_count(char[]);
+void reverse(char[]);
+
+int main()
+{
+ char str1[100], str2[100], choice;
+ int result_cmp;
+
+ printf("Enter first string (Max: 100 character): ");
+ fgets(str1, sizeof(str1), stdin);
+ str1[strcspn(str1, "\n")] = '\0';
+ // this will replace the enter (\n) used in the end to null
+
+ printf("Enter second string (Max: 100 character): ");
+ fgets(str2, sizeof(str2), stdin);
+ str2[strcspn(str2, "\n")] = '\0';
+
+ while (1)
+ {
+ printf("\n\n\n ========== MENU ==========\n"
+ "a. Show address of each character\n"
+ "b. Concatenate two strings without using strcat()\n"
+ "c. Concatenate two strings using strcat()\n"
+ "d. Compare two strings\n"
+ "e. Find string length using pointers\n"
+ "f. Convert lowercase to uppercase\n"
+ "g. Convert uppercase to lowercase\n"
+ "h. Count number of vowels\n"
+ "i. Reverse the string\n"
+ "1. Change input strings\n"
+ "0. Exit\n");
+ printf("\nEnter your choice: ");
+ scanf(" %c", &choice);
+ choice = tolower(choice);
+
+ switch (choice)
+ {
+ case '1':
+ while (getchar() != '\n')
+ ;
+ printf("Enter first string (Max: 100 character): ");
+ fgets(str1, sizeof(str1), stdin);
+ str1[strcspn(str1, "\n")] = '\0';
+
+ printf("Enter second string (Max: 100 character): ");
+ fgets(str2, sizeof(str2), stdin);
+ str2[strcspn(str2, "\n")] = '\0';
+
+ break;
+ case '0':
+ printf("\n\n\nExiting program...\n\n");
+ return 0;
+
+ case 'a':
+ printf("\n --- Show address of each character ---\n");
+ printf("\nSrting 1: ");
+ address_char(str1);
+ printf("\nString 2: ");
+ address_char(str2);
+ break;
+ case 'b':
+ printf("\n --- Concatenate two strings without using strcat() ---\n");
+ printf("\nResult: ");
+ concat_manual(str1, str2);
+ break;
+ case 'c':
+ printf("\n --- Concatenate two strings using strcat() ---\n");
+ printf("\nResult: ");
+ concat_strcat(str1, str2);
+ break;
+ case 'd':
+ printf("\n --- Compare two strings ---\n");
+ result_cmp = string_cmp(str1, str2);
+ if (result_cmp == 0)
+ {
+ printf("\nString 1 = String 2");
+ break;
+ }
+ else if (result_cmp > 0)
+ {
+ printf("\nString 1 > String 2");
+ break;
+ }
+ else
+ {
+ printf("\nString 1 < String 2");
+ break;
+ }
+ case 'e':
+ printf("\n --- Find string length using pointers ---\n");
+ printf("\nLength of the String_1: %d", string_len(str1));
+ printf("\nLength of the String_2: %d", string_len(str2));
+ break;
+ case 'f':
+ printf("\n --- Convert lowercase to uppercase ---\n");
+ printf("\nString 1: ");
+ ltou(str1);
+ printf("\nString 2: ");
+ ltou(str2);
+ break;
+ case 'g':
+ printf("\n --- Convert uppercase to lowercase ---\n");
+ printf("\nString 1: ");
+ utol(str1);
+ printf("\nString 2: ");
+ utol(str2);
+ break;
+ case 'h':
+ printf("\n --- Count number of vowels ---\n");
+ printf("\nString 1: %d", vowel_count(str1));
+ printf("\nString 2: %d", vowel_count(str2));
+ break;
+ case 'i':
+ printf("\n --- Reverse the string ---\n");
+ printf("\nString 1: ");
+ reverse(str1);
+ printf("\nString 2: ");
+ reverse(str2);
+ break;
+ default:
+ printf("\nWrong choice. Try again...\n");
+ }
+ }
+}
+
+void address_char(char *str)
+{
+ printf("\nCharacter | Memory Address");
+ printf("\n--------- | --------------");
+
+ while (*str != '\0')
+ {
+ printf("\n %-6c| %p", *str, (void *)str);
+ str++;
+ }
+}
+
+void concat_manual(char str1[], char str2[])
+{
+ int size1 = strlen(str1);
+ int size2 = strlen(str2);
+ char result[size1 + size2 + 1];
+ int i = 0, j;
+
+ j = 0;
+ while (str1[j] != '\0')
+ {
+ result[i] = str1[j];
+ i++;
+ j++;
+ }
+
+ j = 0;
+ while (str2[j] != '\0')
+ {
+ result[i] = str2[j];
+ i++;
+ j++;
+ }
+
+ result[i] = '\0';
+ printf("%s\n", result);
+}
+
+void concat_strcat(char str1[], char str2[])
+{
+ int size1 = strlen(str1);
+ int size2 = strlen(str2);
+ char result[size1 + size2 + 1];
+
+ result[0] = '\0';
+ strcat(result, str1);
+ strcat(result, str2);
+
+ printf("%s\n", result);
+}
+
+int string_cmp(char *str1, char *str2)
+{
+ // written based on strcmp()
+ while (*str1 != '\0' && (*str1 == *str2))
+ {
+ str1++;
+ str2++;
+ }
+ return (*str1 - *str2);
+}
+
+int string_len(char *str)
+{
+ char *end = str;
+ while (*end != '\0')
+ {
+ end++;
+ }
+ return end - str;
+}
+
+void ltou(char str[])
+{
+ int i;
+ for (i = 0; str[i] != '\0'; i++)
+ {
+ printf("%c", toupper(str[i]));
+ }
+}
+
+void utol(char str[])
+{
+ int i;
+ for (i = 0; str[i] != '\0'; i++)
+ {
+ printf("%c", tolower(str[i]));
+ }
+}
+
+int vowel_count(char str[])
+{
+ int i, vowel = 0;
+ char character;
+ for (i = 0; str[i] != '\0'; i++)
+ {
+ character = tolower(str[i]);
+ if (character == 'a' || character == 'e' || character == 'i' || character == 'o' || character == 'u')
+ {
+ vowel++;
+ }
+ }
+ return vowel;
+}
+
+void reverse(char str[])
+{
+ int len = strlen(str);
+ char result[len + 1];
+ char *start = result;
+ char *end = result + len - 1;
+ char temp;
+
+ result[0] = '\0';
+ strcat(result, str);
+
+ while (start < end)
+ {
+ temp = *start;
+ *start = *end;
+ *end = temp;
+ start++;
+ end--;
+ }
+ printf("%s\n", result);
+}+
\ No newline at end of file
diff --git a/docs/index.html b/docs/index.html
@@ -1465,6 +1465,8 @@ maximum and minimum value among them. */
#include <stdio.h>
#include <stdlib.h>
+// use atoi()
+
int main(int argc, char *argv[])
{
int current_val, max_val, min_val, i;
@@ -3126,6 +3128,332 @@ void reverse(struct Array *array)
}</div>
</div>
+ <div class="file-item flex items-center justify-between px-3 py-2 hover:bg-white hover:shadow-sm rounded-lg transition-all group border border-transparent hover:border-slate-100 mb-1">
+ <div class="flex items-center gap-2.5 min-w-0 cursor-pointer flex-1" onclick="showCode('code-assignment-secondary-assignment-s-14-c', 'assignment-s-14.c', 'https://github.com/notamitgamer/bsc/blob/main/assignment-secondary/assignment-s-14.c')">
+ <svg class="w-4 h-4 text-slate-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+ <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" />
+ </svg>
+ <span class="text-sm text-slate-600 font-medium group-hover:text-blue-600 truncate">assignment-s-14.c</span>
+ </div>
+ <div class="flex items-center gap-2 opacity-0 group-hover:opacity-100 transition-opacity">
+ <a href="https://github.com/notamitgamer/bsc/blob/main/assignment-secondary/assignment-s-14.c" target="_blank" class="p-1.5 text-slate-400 hover:text-slate-700 hover:bg-slate-100 rounded-md" title="View on GitHub">
+ <svg class="w-4 h-4" fill="currentColor" viewBox="0 0 24 24"><path fill-rule="evenodd" d="M12 2C6.477 2 2 6.484 2 12.017c0 4.425 2.865 8.18 6.839 9.504.5.092.682-.217.682-.483 0-.237-.008-.868-.013-1.703-2.782.605-3.369-1.343-3.369-1.343-.454-1.158-1.11-1.466-1.11-1.466-.908-.62.069-.608.069-.608 1.003.07 1.531 1.032 1.531 1.032.892 1.53 2.341 1.088 2.91.832.092-.647.35-1.088.636-1.338-2.22-.253-4.555-1.113-4.555-4.951 0-1.093.39-2.126 1.029-2.935-.103-.253-.446-1.372.097-2.897 0 0 .84-.27 2.75 1.026A9.564 9.564 0 0112 6.844c.85.004 1.705.115 2.504.337 1.909-1.296 2.747-1.027 2.747-1.027.546 1.525.202 2.644.1 2.897.64.809 1.026 1.841 1.026 2.935 0 3.847-2.337 4.687-4.565 4.935.359.309.678.92.678 1.855 0 1.338-.012 2.419-.012 2.747 0 .268.18.58.688.482A10.019 10.019 0 0022 12.017C22 6.484 17.522 2 12 2z" clip-rule="evenodd"></path></svg>
+ </a>
+ </div>
+ <!-- Embedded Code Storage -->
+ <div id="code-assignment-secondary-assignment-s-14-c" style="display:none;">/*
+ * ======================================================================================
+ * COPYRIGHT (C) 2025 AMIT DUTTA. ALL RIGHTS RESERVED.
+ * ======================================================================================
+ * Repository: https://github.com/notamitgamer
+ * Author : Amit Dutta
+ * License : EDUCATIONAL SOURCE-AVAILABLE LICENSE (ESAL-1.0)
+ * ======================================================================================
+ *
+ * [ IMPORTANT LEGAL NOTICE ]
+ *
+ * 1. PROPRIETARY STATUS:
+ * This software ("The Software") is the intellectual property of Amit Dutta.
+ * It is NOT "Open Source" in the traditional sense. It is "Source-Available"
+ * for educational observation only.
+ *
+ * 2. ACADEMIC INTEGRITY & RESTRICTION:
+ * The use of this code, in whole or in part, for the purpose of submitting
+ * academic assignments, projects, lab reports, or examinations at
+ * WEST BENGAL STATE UNIVERSITY (WBSU) or any other educational institution
+ * is STRICTLY PROHIBITED.
+ *
+ * >>> VIOLATION OF THIS CLAUSE WILL BE REPORTED AS ACADEMIC MISCONDUCT. <<<
+ *
+ * 3. PERMISSIONS:
+ * You are granted a revocable license to:
+ * - Read and study the code to understand algorithms.
+ * - Compile and run the code locally for personal testing.
+ *
+ * 4. NO WARRANTY:
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.
+ *
+ * ======================================================================================
+ */
+
+/*
+ Write a menu-driven program to perform the following string operations:
+ a. Show address of each character
+ b. Concatenate two strings without using strcat()
+ c. Concatenate two strings using strcat()
+ d. Compare two strings
+ e. Find string length using pointers
+ f. Convert lowercase to uppercase
+ g. Convert uppercase to lowercase
+ h. Count number of vowels
+ i. Reverse the string
+*/
+
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+
+void address_char(char *);
+void concat_manual(char[], char[]);
+void concat_strcat(char[], char[]);
+int string_cmp(char *, char *);
+int string_len(char *);
+void ltou(char[]);
+void utol(char[]);
+int vowel_count(char[]);
+void reverse(char[]);
+
+int main()
+{
+ char str1[100], str2[100], choice;
+ int result_cmp;
+
+ printf("Enter first string (Max: 100 character): ");
+ fgets(str1, sizeof(str1), stdin);
+ str1[strcspn(str1, "\n")] = '\0';
+ // this will replace the enter (\n) used in the end to null
+
+ printf("Enter second string (Max: 100 character): ");
+ fgets(str2, sizeof(str2), stdin);
+ str2[strcspn(str2, "\n")] = '\0';
+
+ while (1)
+ {
+ printf("\n\n\n ========== MENU ==========\n"
+ "a. Show address of each character\n"
+ "b. Concatenate two strings without using strcat()\n"
+ "c. Concatenate two strings using strcat()\n"
+ "d. Compare two strings\n"
+ "e. Find string length using pointers\n"
+ "f. Convert lowercase to uppercase\n"
+ "g. Convert uppercase to lowercase\n"
+ "h. Count number of vowels\n"
+ "i. Reverse the string\n"
+ "1. Change input strings\n"
+ "0. Exit\n");
+ printf("\nEnter your choice: ");
+ scanf(" %c", &choice);
+ choice = tolower(choice);
+
+ switch (choice)
+ {
+ case '1':
+ while (getchar() != '\n')
+ ;
+ printf("Enter first string (Max: 100 character): ");
+ fgets(str1, sizeof(str1), stdin);
+ str1[strcspn(str1, "\n")] = '\0';
+
+ printf("Enter second string (Max: 100 character): ");
+ fgets(str2, sizeof(str2), stdin);
+ str2[strcspn(str2, "\n")] = '\0';
+
+ break;
+ case '0':
+ printf("\n\n\nExiting program...\n\n");
+ return 0;
+
+ case 'a':
+ printf("\n --- Show address of each character ---\n");
+ printf("\nSrting 1: ");
+ address_char(str1);
+ printf("\nString 2: ");
+ address_char(str2);
+ break;
+ case 'b':
+ printf("\n --- Concatenate two strings without using strcat() ---\n");
+ printf("\nResult: ");
+ concat_manual(str1, str2);
+ break;
+ case 'c':
+ printf("\n --- Concatenate two strings using strcat() ---\n");
+ printf("\nResult: ");
+ concat_strcat(str1, str2);
+ break;
+ case 'd':
+ printf("\n --- Compare two strings ---\n");
+ result_cmp = string_cmp(str1, str2);
+ if (result_cmp == 0)
+ {
+ printf("\nString 1 = String 2");
+ break;
+ }
+ else if (result_cmp > 0)
+ {
+ printf("\nString 1 > String 2");
+ break;
+ }
+ else
+ {
+ printf("\nString 1 < String 2");
+ break;
+ }
+ case 'e':
+ printf("\n --- Find string length using pointers ---\n");
+ printf("\nLength of the String_1: %d", string_len(str1));
+ printf("\nLength of the String_2: %d", string_len(str2));
+ break;
+ case 'f':
+ printf("\n --- Convert lowercase to uppercase ---\n");
+ printf("\nString 1: ");
+ ltou(str1);
+ printf("\nString 2: ");
+ ltou(str2);
+ break;
+ case 'g':
+ printf("\n --- Convert uppercase to lowercase ---\n");
+ printf("\nString 1: ");
+ utol(str1);
+ printf("\nString 2: ");
+ utol(str2);
+ break;
+ case 'h':
+ printf("\n --- Count number of vowels ---\n");
+ printf("\nString 1: %d", vowel_count(str1));
+ printf("\nString 2: %d", vowel_count(str2));
+ break;
+ case 'i':
+ printf("\n --- Reverse the string ---\n");
+ printf("\nString 1: ");
+ reverse(str1);
+ printf("\nString 2: ");
+ reverse(str2);
+ break;
+ default:
+ printf("\nWrong choice. Try again...\n");
+ }
+ }
+}
+
+void address_char(char *str)
+{
+ printf("\nCharacter | Memory Address");
+ printf("\n--------- | --------------");
+
+ while (*str != '\0')
+ {
+ printf("\n %-6c| %p", *str, (void *)str);
+ str++;
+ }
+}
+
+void concat_manual(char str1[], char str2[])
+{
+ int size1 = strlen(str1);
+ int size2 = strlen(str2);
+ char result[size1 + size2 + 1];
+ int i = 0, j;
+
+ j = 0;
+ while (str1[j] != '\0')
+ {
+ result[i] = str1[j];
+ i++;
+ j++;
+ }
+
+ j = 0;
+ while (str2[j] != '\0')
+ {
+ result[i] = str2[j];
+ i++;
+ j++;
+ }
+
+ result[i] = '\0';
+ printf("%s\n", result);
+}
+
+void concat_strcat(char str1[], char str2[])
+{
+ int size1 = strlen(str1);
+ int size2 = strlen(str2);
+ char result[size1 + size2 + 1];
+
+ result[0] = '\0';
+ strcat(result, str1);
+ strcat(result, str2);
+
+ printf("%s\n", result);
+}
+
+int string_cmp(char *str1, char *str2)
+{
+ // written based on strcmp()
+ while (*str1 != '\0' && (*str1 == *str2))
+ {
+ str1++;
+ str2++;
+ }
+ return (*str1 - *str2);
+}
+
+int string_len(char *str)
+{
+ char *end = str;
+ while (*end != '\0')
+ {
+ end++;
+ }
+ return end - str;
+}
+
+void ltou(char str[])
+{
+ int i;
+ for (i = 0; str[i] != '\0'; i++)
+ {
+ printf("%c", toupper(str[i]));
+ }
+}
+
+void utol(char str[])
+{
+ int i;
+ for (i = 0; str[i] != '\0'; i++)
+ {
+ printf("%c", tolower(str[i]));
+ }
+}
+
+int vowel_count(char str[])
+{
+ int i, vowel = 0;
+ char character;
+ for (i = 0; str[i] != '\0'; i++)
+ {
+ character = tolower(str[i]);
+ if (character == 'a' || character == 'e' || character == 'i' || character == 'o' || character == 'u')
+ {
+ vowel++;
+ }
+ }
+ return vowel;
+}
+
+void reverse(char str[])
+{
+ int len = strlen(str);
+ char result[len + 1];
+ char *start = result;
+ char *end = result + len - 1;
+ char temp;
+
+ result[0] = '\0';
+ strcat(result, str);
+
+ while (start < end)
+ {
+ temp = *start;
+ *start = *end;
+ *end = temp;
+ start++;
+ end--;
+ }
+ printf("%s\n", result);
+}</div>
+ </div>
+
</div>
</div>
