How to make a calculator using c programming?

Hi guys welcome to my new blog. If you want to make a calculator using c programming then you are at the right place. In this blog i am going to tell that how to make a calculator using c programming & also going to discuss concepts used in it.

Pseudocode & concept:-

If you want to make code of a calculator or something big you should first right the pseudocode in order to solve the whole problem. This is how you should approach it:-

Declare variables float a,b,c,d & char x for operator sign
⬇️
Enter the first number
⬇️
Scan it
⬇️
Enter the second number
⬇️
Scan it
⬇️
Enter the operation +,-,÷,×
⬇️
Scan it
⬇️
Now,use switch case as there is one variable x(Operator +,-,÷,×)& multiple cases
⬇️
Case'+':For addition
⬇️
Case'-':For subraction
⬇️
Case'×':For multipication
⬇️
Case'/':For division
⬇️
Default:For invalid operator*

Switch case statements:-
Switch case statements are used in case of if elseif statements & when the cases depend on the variable inside switch if you enter 1 then case 1 will run. If 2 then case 2 and so on and after the whole case statement there is a break to get the control outside the loop. And there is a default statement there if someone enters different thing which is not mentioned in above case label then default statement will execute.

Syntax:-

switch(x)//x must be a variable

case 1: Statement 1;
break;
case 2: Statement 2;
break;
:
:
:
:
case n: Statement n;
break;

default: Statement def;
break;

Code for the calculator:-

#include< stdio.h >
#include< stdlib.h >
int main()
{
char y;
float a,b,c,d;//makes calculator more precise

printf("Enter the first number\n");
scanf("%f",&a);
printf("Enter the second number\n");
scanf("%f",&b);
printf("Enter the operation:\n+\n-\n*\n/\n");
scanf(" %c",&y);// Space before %c to have enter and then scan the character otherwise it will take enter as char & default case will run

switch(y)
{
case '+': c=a+b; //Case label 1
printf("ADDITION of two numbers is %f",c);
break;
case '-': c=a-b;
printf("SUBTRACTION of two numbers is %f ",c);
break;
case '*': c=a*b;
printf("MUTIPICATION of two numbers is %f",c);
break;

case '/': d=a/b;
printf("DIVISON of two numbers is %f ",d);
break;

default:
printf("Invalid operator");
break;
}
return 0;
}

Source code on github

I hope you liked the blog. Make sure that you comment on this blog & suggest things to make the calculator more better.Happy coding❤❤