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How to write a simple calculator program using C language?
Begin by writing the C code to create a simple calculator. Then, follow the algorithm given below to write a C program.
Algorithm
Step 1: Declare variables
Step 2: Enter any operator at runtime
Step 3: Enter any two integer values at runtime
Step 4: Apply switch case to select the operator:
// case '+': result = num1 + num2;
break;
case '-': result = num1 - num2;
break;
case '*': result = num1 * num2;
break;
case '/': result = num1 / num2;
break;
default: printf("
Invalid Operator ");
Step 5: Print the resultExample
Following is the C program for calculator by using the Switch Case −
#include <stdio.h>
int main(){
char Operator;
float num1, num2, result = 0;
printf("
Enter any one operator like +, -, *, / : ");
scanf("%c", &Operator);
printf("Enter the values of Operands num1 and num2
: ");
scanf("%f%f", &num1, &num2);
switch(Operator){
case '+': result = num1 + num2;
break;
case '-': result = num1 - num2;
break;
case '*': result = num1 * num2;
break;
case '/': result = num1 / num2;
break;
default: printf("
Invalid Operator ");
}
printf("The value = %f", result);
return 0;
}Output
When the above program is executed, it produces the following result −
Enter any one operator: + Enter values of Operands num1 and num2: 23 45 The value = 68.000000
Updated on: 08-Mar-2021
16K+ Views
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