C Programming Tutorial: Post-Lecture Exercises Answers179

In this tutorial, we will provide detailed answers to the post-lecture exercises in our C programming tutorial series. These exercises are designed to help you reinforce your understanding of the concepts covered in each lecture and to apply your knowledge to solve practical problems.

Exercise 1: Print a Welcome Message

Write a C program to print a welcome message to the user.Solution:
```c
#include
int main() {
printf("Welcome to the C programming tutorial!");
return 0;
}
```

Exercise 2: Convert Degrees Celsius to Fahrenheit

Write a C program to convert a temperature from degrees Celsius to degrees Fahrenheit.Solution:
```c
#include
int main() {
float celsius, fahrenheit;
printf("Enter the temperature in degrees Celsius: ");
scanf("%f", &celsius);
fahrenheit = (celsius * 9 / 5) + 32;
printf("The temperature in degrees Fahrenheit is: %.2f", fahrenheit);
return 0;
}
```

Exercise 3: Calculate the Area of a Triangle

Write a C program to calculate the area of a triangle given its base and height.Solution:
```c
#include
int main() {
float base, height, area;
printf("Enter the base of the triangle: ");
scanf("%f", &base);
printf("Enter the height of the triangle: ");
scanf("%f", &height);
area = 0.5 * base * height;
printf("The area of the triangle is: %.2f", area);
return 0;
}
```

Exercise 4: Print a Number in Reverse Order

Write a C program to print a given number in reverse order.Solution:
```c
#include
int main() {
int num, reversedNum = 0;
printf("Enter a number: ");
scanf("%d", &num);
while (num != 0) {
reversedNum = reversedNum * 10 + num % 10;
num /= 10;
}
printf("The reversed number is: %d", reversedNum);
return 0;
}
```

Exercise 5: Find the Largest Element in an Array

Write a C program to find the largest element in an array of integers.Solution:
```c
#include
int main() {
int arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
int n = sizeof(arr) / sizeof(arr[0]);
int largest = arr[0];
for (int i = 1; i < n; i++) {
if (arr[i] > largest) {
largest = arr[i];
}
}
printf("The largest element in the array is: %d", largest);
return 0;
}
```

Exercise 6: Find the Sum of Even Numbers in an Array

Write a C program to find the sum of all even numbers in an array of integers.Solution:
```c
#include
int main() {
int arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
int n = sizeof(arr) / sizeof(arr[0]);
int sum = 0;
for (int i = 0; i < n; i++) {
if (arr[i] % 2 == 0) {
sum += arr[i];
}
}
printf("The sum of the even numbers in the array is: %d", sum);
return 0;
}
```

Conclusion

These exercises provide a hands-on approach to reinforcing your understanding of C programming concepts. By working through these exercises, you can gain practical experience in applying your knowledge and developing problem-solving skills in C.

2024-11-01

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