Merge branch 'SharafatKarim:main' into main

questions/11.txt

@@ -1,15 +1,17 @@
-1. Define a structure data type called time_struct
-containing three members integer hour, integer
-minute and integer second . Develop a program
+1. Define a structure data type called *time_struct*
+containing three members integer *hour*, integer
+*minute* and integer *second* . Develop a program
 that would assign values to the individual members
 and display the time in the following form:
+```
 		16:40:51
+```
 
 2. Modify the above program such that a function is
 used to input values to the members and another
 function to display the time.
 
-3. Design a function update that would accept the
+3. Design a function *update* that would accept the
 data structure designed in Exercise 11.1 and
 increments time by one second and returns the new
 time. (If the increment results in 60 seconds, then
@@ -19,42 +21,49 @@ member is incremented by one. Then, if the result is
 the hour member is incremented by one. Finally
 when the hour becomes 24, it is set to zero.)
 
-4. Define a structure data type named date containing three
- integer members day , month , and year. Develop an interactive
+4. Define a structure data type named *date* containing three 
+integer members *day* , *month* , and *year*. Develop an interactive
 modular program to perform the following tasks:
+```
 (a) To read data into structure mem bers by a function
 (b) To validate the date entered by another function
 (c) To print the date in the format
 		April 29, 2002
 by a third function.
+```
 The input data should be three integers like 29, 4,
 and 2002 corresponding to day, month, and year.
 Examples of invalid data:
+```
 	31, 4, 2002 – April has only 30 days
 	29, 2, 2002 – 2002 is not a leap year
+```
 
-5. Design a function update that accepts the date
+5. Design a function *update* that accepts the *date*
 structure designed in Exercise 11.4 to increment the
 date by one day and return the new date. The
 following rules are applicable:
+```
 (a) If the date is the last day in a month, month should
  be incremented
 (b) If it is the last day in December, the year should
 be incremented
 (c) There are 29 days in February of a leap year
+```
 
 6. Modify the input function used in Exercise 11.4 such
 that it reads a value that represents the date in the
 form of a long integer, like 19450815 for the date
 15-8-1945 (August 15, 1945) and assigns suitable
 values to the members day, month , and year.
-Use suitable algorithm to
+> Use suitable algorithm to
 convert the long integer 19450815 into year, month
 and day.
 
 7. Add a function called nextdate to the program
 designed in Exercise 11.4 to perform the following
 task:
+```
 (a) Accepts two arguments, one of the structure data
 containing the present date and the second an
 integer that represents the number of days to be
@@ -63,74 +72,87 @@ added to the present date.
 structure containing the next date correctly.
 Note that the next date may be in the next month or
 even the next year.
+```
 
-8. Use the date structure defined in Exercise 11.4 to
+8. Use the *date* structure defined in Exercise 11.4 to
 store two dates. Develop a function that will take
 these two dates as input and compares them.
-(a) It returns 1, if the date1 is earlier than date2
-(b) It returns 0, if date1 is later date
+```
+(a) It returns 1, if the *date1* is earlier than *date2*
+(b) It returns 0, if *date1* is later date
+```
 
 9. Define a structure to represent a vector (a series of
 integer values) and write a modular program to
 perform the following tasks:
+```
 (a) To create a vector
 (b) To modify the value of a given element
 (c) To multiply by a scalar value
 (d) To display the vector in the form 
 (10, 20, 30, . . . . . ..)
+```
 
 10. Add a function to the program of Exercise 11.9 that
 accepts two vectors as input parameters and return
 the addition of two vectors.
 
-11. Create two structures named metric and British which store
-the values of distances. The metric structure stores
+11. Create two structures named *metric* and *British* which store
+the values of distances. The *metric* structure stores
 the values in metres and centimetres and the British
 structure stores the values in feet and inches. Write
 a program that reads values for the structure
 variables and adds values contained in one variable
-of metric to the contents of another variable of
-British. The program should display the result in the
+of *metric* to the contents of another variable of
+*British*. The program should display the result in the
 format of feet and inches or metres and centimetres
 as required.
 
-12. Define a structure named census with the
+12. Define a structure named *census* with the
 following three members:
+```
 (a) A character array city [ ] to store names
 (b) A long integer to store population of the city
 (c) A float member to store the literacy level
+```
 Write a program to do the following:
+```
 (a) To read details for 5 cities randomly using an
 array variable
 (b) To sort the list alphabetically
 (c) To sort the list based on literacy level
 (d) To sort the list based on population
 (e) To display sorted lists
+```
 
 13. Define a structure that can describe an hotel. It
 should have members that include the name,
 address, grade, average room charge, and number
 of rooms.
 Write functions to perform the following operations:
+```
 (a) To print out hotels of a given grade in order of
 charges.
 (b) To print out hotels with room charges less than a
 given value.
+```
 
-14. Define a structure called cricket that will describe
+14. Define a structure called *cricket* that will describe
 the following information:
+```
 	player name
 	team name
 	batting average
-Using cricket, declare an array player with 50
+```
+Using *cricket*, declare an array *player* with 50
 elements and write a program to read the
 information about all the 50 players and print a
 team-wise list containing names of players with their
 batting average.
 
-15. Design a structure student_record to contain
+15. Design a structure *student_record* to contain
 name, date of birth, and total marks obtained. Use
-the date structure designed in Exercise 11.4 to
+the *date* structure designed in Exercise 11.4 to
 represent the date of birth.
 Develop a program to read data for 10 students in a
 class and list them rank-wise.

solutions/sadman/10/4.c

@@ -1,4 +1,4 @@
-#include <stdio.h>
+ #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
 

solutions/sharafat/10/1.c

@@ -0,0 +1,18 @@
+#include<stdio.h>
+
+int a = 10, b = 20;
+
+void swap (void)
+{
+    b = a + b ;
+    a = b - a ;
+    b = b - a ;
+}
+
+int main()
+{
+    printf("Before swap: a = %d, b = %d\n", a, b);
+    swap();
+    printf("After swap: a = %d, b = %d\n", a, b);
+    return 0;
+}

solutions/sharafat/10/10.c

@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <math.h>
+
+float perimeter(float a, float b, float c)
+{
+    return a + b + c;
+}
+
+float area(float a, float b, float c)
+{
+    float s = (a + b + c) / 2;
+    return sqrt((s - a) * (s - b) * (s - c));
+}
+
+int main()
+{
+    float a, b, c;
+    char operation;
+
+    printf("Enter first side: ");
+    scanf("%f", &a);
+    printf("Enter second side: ");
+    scanf("%f", &b);
+    printf("Enter third side: ");
+    scanf("%f", &c);
+
+    printf("Enter one of the followings: ");
+    printf("\n(a) Perimeter of the triangle ");
+    printf("\n(b) Area of the triangle ");
+    printf("\n");
+
+    scanf(" %c", &operation);
+    switch (operation)
+    {
+        case 'a':
+            printf("Result -> %f\n", perimeter(a, b, c));
+            break;
+        case 'b':
+            printf("Result -> %f\n", area(a, b, c));
+            break;
+        default:
+            printf("Invalid operation\n");
+    }
+}

solutions/sharafat/10/11.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+
+int find_largest(int *matrix, int rows, int cols) {
+    int i, j, largest = *matrix;
+    for (i = 0; i < rows; i++) {
+        for (j = 0; j < cols; j++) {
+            if (*(matrix + i * cols + j) > largest) {
+                largest = *(matrix + i * cols + j);
+            }
+        }
+    }
+    return largest;
+}
+
+int main() {
+    int m, n, i, j;
+    printf("Enter number of rows and columns: ");
+    scanf("%d %d", &m, &n);
+
+    int matrix[m][n];
+    printf("Enter matrix elements: \n");
+    for (i = 0; i < m; i++) {
+        for (j = 0; j < n; j++) {
+            scanf("%d", &matrix[i][j]);
+        }
+    }
+
+    int largest = find_largest(&matrix[0][0], m, n);
+    printf("Largest element in the matrix is %d\n", largest);
+
+    return 0;
+}

solutions/sharafat/10/12.c

@@ -0,0 +1,64 @@
+#include <stdio.h>
+
+void multiply_matrices(int *matrix_one, int *matrix_two, int m, int n)
+{
+    int i, j, k;
+    int result[m][m];
+
+    for (i = 0; i < m; i++)
+    {
+        for (j = 0; j < m; j++)
+        {
+
+            result[i][j] = 0;
+            for (k = 0; k < n; k++)
+            {
+                result[i][j] += *(matrix_one + i * n + k) * *(matrix_two + k * m + j);
+            }
+        }
+    }
+
+    printf("Resultant matrix: \n");
+    for (i = 0; i < m; i++)
+    {
+        printf("[");
+        for (j = 0; j < m; j++)
+        {
+            printf(" %d ", result[i][j]);
+        }
+        printf("]\n");
+    }
+}
+
+int main()
+{
+    int m, n;
+    printf("Enter m and n (mxn) (nxm): ");
+    scanf("%d %d", &m, &n);
+
+    int matrix_one[m][n];
+    int matrix_two[n][m];
+    int i, j;
+
+    printf("Enter matrix one elements: \n");
+    for (i = 0; i < m; i++)
+    {
+        for (j = 0; j < n; j++)
+        {
+            printf("Enter element at (%d, %d): ", i, j);
+            scanf("%d", &matrix_one[i][j]);
+        }
+    }
+
+    printf("Enter matrix two elements: \n");
+    for (i = 0; i < n; i++)
+    {
+        for (j = 0; j < m; j++)
+        {
+            printf("Enter element at (%d, %d): ", i, j);
+            scanf("%d", &matrix_two[i][j]);
+        }
+    }
+
+    multiply_matrices((int *)matrix_one, (int *)matrix_two, m, n);
+}