Here is a simple C program to create a calculator that performs basic arithmetic operations:
#include <stdio.h>
void printMenu() {
printf("Simple Calculator\n");
printf("1. Addition\n");
printf("2. Subtraction\n");
printf("3. Multiplication\n");
printf("4. Division\n");
printf("5. Exit\n");
}
int main() {
int choice;
float num1, num2, result;
while (1) {
printMenu();
printf("Enter your choice: ");
scanf("%d", &choice);
if (choice == 5) {
printf("Exiting the calculator. Goodbye!\n");
break;
}
printf("Enter the first number: ");
scanf("%f", &num1);
printf("Enter the second number: ");
scanf("%f", &num2);
switch (choice) {
case 1:
result = num1 + num2;
printf("%.2f + %.2f = %.2f\n", num1, num2, result);
break;
case 2:
result = num1 - num2;
printf("%.2f - %.2f = %.2f\n", num1, num2, result);
break;
case 3:
result = num1 * num2;
printf("%.2f * %.2f = %.2f\n", num1, num2, result);
break;
case 4:
if (num2 != 0) {
result = num1 / num2;
printf("%.2f / %.2f = %.2f\n", num1, num2, result);
} else {
printf("Error! Division by zero is not allowed.\n");
}
break;
default:
printf("Invalid choice. Please choose a valid option.\n");
}
}
return 0;
}
```
*Example Use Cases:*
1. Run the program and select option 1 (Addition).
2. Enter two numbers, e.g., 10 and 20.
3. The program will display the result: 10.00 + 20.00 = 30.00.
4. Repeat the process for other arithmetic operations.
*How to Compile and Run:*
1. Save the code in a file named `calculator.c`.
2. Open a terminal or command prompt.
3. Navigate to the directory where you saved the file.
4. Compile the program using `gcc calculator.c -o calculator`.
5. Run the program using `./calculator` (on Linux/macOS) or `calculator.exe` (on Windows).
