Simple calculator program in c; Through this tutorial, we will learn how to create simple calculator program in c programming language using switch case and if else statement.
Programs for Simple Calculator in C
- C Program for Simple Calculator using Switch Case
- C Program for Simple Calculator using If else
C Program for Simple Calculator using Switch Case
#include <stdio.h>
int main() {
char op;
double first, second;
printf("Enter an operator (+, -, *, /): ");
scanf("%c", &op);
printf("Enter first numbers: ");
scanf("%lf", &first);
printf("Enter second numbers: ");
scanf("%lf", &second);
switch (op) {
case '+':
printf("%.1lf + %.1lf = %.1lf", first, second, first + second);
break;
case '-':
printf("%.1lf - %.1lf = %.1lf", first, second, first - second);
break;
case '*':
printf("%.1lf * %.1lf = %.1lf", first, second, first * second);
break;
case '/':
printf("%.1lf / %.1lf = %.1lf", first, second, first / second);
break;
// operator doesn't match any case constant
default:
printf("Error! operator is not correct");
}
return 0;
}
The output of the above c program; as follows:
Enter an operator (+, -, *, /): + Enter first numbers: 5 Enter second numbers: 2 5.0 + 2.0 = 7.0
C Program for Simple Calculator using If else
#include <stdio.h>
int main()
{
char Operator;
float num1, num2, result = 0;
printf("\n Please Enter an Operator (+, -, *, /) : ");
scanf("%c", &Operator);
printf("\n Please Enter the Values for two Operands: num1 and num2 : ");
scanf("%f%f", &num1, &num2);
if(Operator == '+')
{
printf("\n The result of %.2f + %.2f = %.2f", num1, num2, num1 + num2);
}
else if(Operator == '-')
{
printf("\n The result of %.2f - %.2f = %.2f", num1, num2, num1 - num2);
}
else if(Operator == '*')
{
printf("\n The result of %.2f * %.2f = %.2f", num1, num2, num1 * num2);
}
else if(Operator == '/')
{
printf("\n The result of %.2f / %.2f = %.2f", num1, num2, num1 / num2);
}
else
{
printf("\n You have enetered an Invalid Operator ");
}
return 0;
}
The output of the above c program; as follows:
Please Enter an Operator (+, -, *, /) : * Please Enter the Values for two Operands: num1 and num2 : 5 2 The result of 5.00 * 2.00 = 10.00