Practice Set 1

// Program 1

#include <stdio.h>

int main() {
    int a;
    printf("Enter value of A: ");
    scanf("%d", &a);
    printf("A: %d\n", a);
    int b;
    printf("Enter value of B: ");
    scanf("%d", &b);
    printf("B: %d\n", b);
    int c = a * b;
    printf("C: %d", c);
    return 0;
}

// Program 2


#include <stdio.h>

#define PI 3.14

int main() {
    double radius, area;

    // Input radius
    printf("Enter the radius of the circle: ");
    scanf("%lf", &radius);

    // Calculate area
    area = PI * radius * radius;

    // Output result
    printf("The area of the circle is: %.2f\n", area);

    return 0;
}

// Program 3

#include <stdio.h>

int main() {
    double celsius, fahrenheit;

    // Input Celsius temperature
    printf("Enter temperature in Celsius: ");
    scanf("%lf", &celsius);

    // Convert to Fahrenheit
    fahrenheit = (celsius * 9/5) + 32;

    // Output result
    printf("Temperature in Fahrenheit: %.2f\n", fahrenheit);

    return 0;
}

// Program 4

#include <stdio.h>

int main() {
    double principal, rate, time, simpleInterest;

    // Input values
    printf("Enter the principal amount: ");
    scanf("%lf", &principal);
    printf("Enter the rate of interest (per annum): ");
    scanf("%lf", &rate);
    printf("Enter the time period (in years): ");
    scanf("%lf", &time);

    // Calculate simple interest
    simpleInterest = (principal * rate * time) / 100;

    // Output result
    printf("The simple interest is: %.2f\n", simpleInterest);

    return 0;
}