made full lab4

src/hello.c

@@ -3,7 +3,8 @@
 
 int main(int argc, char *argv[]) {
   // This is your first C program my friend
-  printf("Hello, RTU World from C Lab in 2025!\n");
+  printf("Hello from  Murad! \n");
+  printf("Hello, RTU World from C Lab in 2025!!!!\n");
   printf("You passed %d argument(s).\n", argc - 1);
   for (int i = 1; i < argc; ++i) {
     printf("  arg[%d] = %s\n", i, argv[i]);

src/lab2_1.c

@@ -1,3 +1,4 @@
+// Name : Murad Hashimov , id : 241ADB148
 #include <stdio.h>
 
 /*
@@ -12,17 +13,26 @@
 */
 
 int sum_to_n(int n) {
-    // TODO: implement sum with a for loop
-    return 0; // placeholder
+  int inp = 0;
+  for (int i = 1; i <= n; i++) {
+    inp = inp + i;
+  }
+  return inp;  // placeholder
 }
 
 int main(void) {
-    int n;
+  int n;
 
-    printf("Enter a positive integer n: ");
-    scanf("%d", &n);
+  printf("Enter a positive integer n: ");
+  scanf("%d", &n);
+  if (n < 1) {
+    printf("Error");
+  } else {
+    int result = sum_to_n(n);
+    printf("Result %d\n", result);
+  }
 
-    // TODO: validate input, call function, and print result
+  // TODO: validate input, call function, and print result
 
-    return 0;
+  return 0;
 }

src/lab2_2.c

@@ -1,3 +1,5 @@
+// Name : Murad Hashimov , id : 241ADB148
+
 #include <stdio.h>
 
 /*
@@ -12,17 +14,30 @@
 */
 
 long long factorial(int n) {
-    // TODO: compute factorial iteratively
-    return 1; // placeholder
+  int a = 1;
+  int res = 1;
+
+  while (a <= n) {
+    res = res * a;
+    a++;
+  }
+  return res;  // placeholder
 }
 
 int main(void) {
-    int n;
+  int n;
+
+  printf("Enter a non-negative integer n: ");
+  scanf("%d", &n);
 
-    printf("Enter a non-negative integer n: ");
-    scanf("%d", &n);
+  if (n < 0) {
+    printf("Error , cause it is negative");
+  } else {
+    int res = factorial(n);
+    printf("Factorial of %d is %d", n, res);
+  }
 
-    // TODO: validate input, call function, print result
+  // TODO: validate input, call function, print result
 
-    return 0;
+  return 0;
 }

src/lab2_3.c

@@ -1,3 +1,6 @@
+// Name : Murad Hashimov , id : 241ADB148
+
+#include <math.h>
 #include <stdio.h>
 
 /*
@@ -12,17 +15,28 @@
 */
 
 int is_prime(int n) {
-    // TODO: check if n is prime using loop up to sqrt(n)
-    return 0; // placeholder
+  for (int i = 2; i <= sqrt(n); i++) {
+    if (n % i == 0) return 0;
+  }
+
+  return 1;
 }
 
 int main(void) {
-    int n;
-
-    printf("Enter an integer n (>= 2): ");
-    scanf("%d", &n);
+  int n;
 
-    // TODO: validate input and print all primes up to n
+  printf("Enter an integer n (>= 2): ");
+  scanf("%d", &n);
 
-    return 0;
+  if (n < 2) {
+    printf("Error");
+  } else {
+    printf("Prime numbers - %d are:\n", n);
+    for (int i = 2; i <= n; i++) {
+      if (is_prime(i)) {
+        printf("%d ", i);
+      }
+    }
+  }
+  return 0;
 }

src/lab3_task1.c

@@ -1,6 +1,6 @@
 /*
  * Lab 3, Task 1
- * Student Name, Student ID
+ * Murad Hashimov, 241ADB148
  *
  * Implement array algorithms:
  *   - find minimum value
@@ -21,8 +21,8 @@
  *   avg = array_avg(arr, 5); // 3.0
  */
 
-#include <stdio.h>
 #include <limits.h>
+#include <stdio.h>
 
 // Function prototypes
 int array_min(int arr[], int size);
@@ -31,40 +31,51 @@ int array_sum(int arr[], int size);
 float array_avg(int arr[], int size);
 
 int main(void) {
-    int arr[] = {10, 20, 5, 30, 15};
-    int size = 5;
+  int arr[] = {10, 20, 5, 30, 15};
+  int size = 5;
 
-    printf("Min: %d\n", array_min(arr, size));
-    printf("Max: %d\n", array_max(arr, size));
-    printf("Sum: %d\n", array_sum(arr, size));
-    printf("Avg: %.2f\n", array_avg(arr, size));
+  printf("Min: %d\n", array_min(arr, size));
+  printf("Max: %d\n", array_max(arr, size));
+  printf("Sum: %d\n", array_sum(arr, size));
+  printf("Avg: %.2f\n", array_avg(arr, size));
 
-    return 0;
+  return 0;
 }
 
 // Implement functions below
 int array_min(int arr[], int size) {
-    // TODO: return smallest element
-    int my_min = INT_MAX; //set to max infinity
-    for (int i=0;i<size;i++) {
-        if (my_min > arr[i]) {
-            my_min = arr[i];
-        }
+  int my_min = INT_MAX;
+  for (int i = 1; i < size; i++) {
+    if (arr[i] < my_min) {
+      my_min = arr[i];
     }
-    return my_min; // placeholder
+  }
+  return my_min;  // placeholder
 }
 
 int array_max(int arr[], int size) {
-    // TODO: return largest element
-    return 0; // placeholder
+  int my_max = INT_MIN;
+  for (int i = 1; i < size; i++) {
+    if (arr[i] > my_max) {
+      my_max = arr[i];
+    }
+  }
+  return my_max;  // placeholder
 }
 
 int array_sum(int arr[], int size) {
-    // TODO: return sum of elements
-    return 0; // placeholder
+  int my_sum = 0;
+  for (int i = 0; i < size; i++) {
+    my_sum = my_sum + arr[i];
+  }
+  return my_sum;  // placeholder
 }
 
 float array_avg(int arr[], int size) {
-    // TODO: return average as float
-    return 0.0f; // placeholder
+  float my_sum = 0.0;
+  for (int i = 0; i < size; i++) {
+    my_sum = my_sum + arr[i];
+  }
+  float my_avg = my_sum / size;
+  return my_avg;  // placeholder
 }

src/lab3_task2.c

@@ -1,6 +1,6 @@
 /*
  * Lab 3, Task 2
- * Student Name, Student ID
+ * Murad Hashimov, 241ADB148
  *
  * Practice using pointers as function parameters.
  * Implement:
@@ -38,9 +38,11 @@ int main(void) {
 
 // Implement functions below
 void swap(int *x, int *y) {
-    // TODO: swap values using a temporary variable
+    int val = *x;
+    *x = *y;
+    *y = val;
 }
 
 void modify_value(int *x) {
-    // TODO: multiply value by 2
+    *x = (*x)*2;
 }

src/lab3_task3.c

@@ -1,6 +1,6 @@
 /*
  * Lab 3, Task 3
- * Student Name, Student ID
+ * Murad Hashimov, 241ADB148
  *
  * Implement basic string handling functions.
  * Write your own versions of:
@@ -41,10 +41,20 @@ int main(void) {
 
 // Implement functions below
 int my_strlen(const char *str) {
-    // TODO: count characters until '\0'
-    return 0; // placeholder
+    int size = 0;
+    while(str[size] != '\0'){
+        size = size + 1;
+    }
+    return size; // placeholder
 }
 
 void my_strcpy(char *dest, const char *src) {
-    // TODO: copy characters until '\0'
+    int val = 0;
+    while (src[val]!='\0'){
+
+        dest[val] = src[val];
+
+        val++;
+    }
+    dest[val] = '\0';
 }

src/rfse.txt

@@ -0,0 +1,2 @@
+Vote for Murad Hashimov! 
+RTU is top G 

src/student.txt

@@ -0,0 +1,3 @@
+Alice
+21
+3.75

src/students.txt

@@ -0,0 +1,2 @@
+2425 Murad
+ 4.500000

src/week4_1_dynamic_array.c

@@ -1,7 +1,7 @@
 /*
  * week4_1_dynamic_array.c
- * Author: [Your Name]
- * Student ID: [Your ID]
+ * Author: [Murad Hashimov]
+ * Student ID: [241ADB148]
  * Description:
  *   Demonstrates creation and usage of a dynamic array using malloc.
  *   Students should allocate memory for an integer array, fill it with data,
@@ -12,6 +12,7 @@
 #include <stdlib.h>
 
 int main(void) {
+    int summ;
     int n;
     int *arr = NULL;
 
@@ -22,17 +23,37 @@ int main(void) {
     }
 
     // TODO: Allocate memory for n integers using malloc
+    arr = malloc(n * sizeof(int));
     // Example: arr = malloc(n * sizeof(int));
 
     // TODO: Check allocation success
+    if (arr == 0) {
+        printf("\nMemory allocation is false!");
+        return 1;
+    }
 
     // TODO: Read n integers from user input and store in array
-
+    printf("Put %d integers into array - \n", n);
+    for (int i = 0; i < n; i++) {
+        if (scanf("%d", &arr[i]) != 1) {
+            printf("Invalid input.\n");
+            free(arr);
+            return 1;
+        }
+    }
     // TODO: Compute sum and average
+    for (int i = 0; i < n; i++) {
+        summ = summ + arr[i];
+    }
+    float average = (float)summ / n;
 
     // TODO: Print the results
+    printf("The sum of values - %d \n", summ);
+
+    printf("The average of values - %f \n", average);
 
     // TODO: Free allocated memory
+    free(arr);
 
     return 0;
 }

src/week4_2_struct_student.c

@@ -1,7 +1,7 @@
 /*
  * week4_2_struct_student.c
- * Author: [Your Name]
- * Student ID: [Your ID]
+ * Author: [Murad Hashimov]
+ * Student ID: [241ADB148]
  * Description:
  *   Demonstrates defining and using a struct in C.
  *   Students should define a 'Student' struct with fields like name, id, and grade.
@@ -13,18 +13,32 @@
 
 // TODO: Define struct Student with fields: name (char[]), id (int), grade (float)
 // Example:
-// struct Student {
-//     char name[50];
-//     int id;
-//     float grade;
-// };
+struct Student {
+    char name[50];
+    int id;
+    float grade;
+};
 
 int main(void) {
+    struct Student student_1;
+
+    struct Student student_2;
+
     // TODO: Declare one or more Student variables
+    strcpy(student_1.name, "Murad Hashimov");  
+    student_1.id = 241148;
+    student_1.grade = 80.0;
 
-    // TODO: Assign values (either manually or via scanf)
+    // student_2
+    strcpy(student_2.name, "Bombo Clad");
+    student_2.id = 241567;
+    student_2.grade = 95;
 
-    // TODO: Print struct contents using printf
+
+    printf("Student 1: Name: %s\n, ID: %d\n, Grade: %f\n", student_1.name, student_1.id, student_1.grade);
+    //
+    printf("Student 2: Name: %s\n, ID: %d\n, Grade: %f\n", student_2.name, student_2.id, student_2.grade);
+
 
     return 0;
 }