Calculator program in C

The below code is a calculator in plain C. It does not take into account the operability of bodmas but just one operation at a time.

The main thing in the source code below in the scanf which scans the input as number symbol number just as in case of normal calculator.

Code:

#include<stdio.h>

float add(float,float);
float sub(float,float);
float product(float,float);
float divide(float,float);

void main()
{
	float n1,n2;
	char sym,choice;
	printf("This Program is a program for calculator\n\n");
	scanf("%f%c%f",&n1,&sym,&n2);
	if(sym=='+')
		printf("\n%f",add(n1,n2));
	if(sym=='-')
		printf("\n%f",sub(n1,n2));
	if(sym=='*')
		printf("\n%f",product(n1,n2));
	if(sym=='/')
		printf("%f",divide(n1,n2));
	printf("\nDo you wish to continue[y/n]");
	scanf("%s",&choice);
	if(choice=='y'||choice=='Y')
		main();
}

float add(float m1,float m2)
{
	return(m1+m2);
}

float sub(float m1,float m2)
{
	return(m1-m2);
}

float product(float m1,float m2)
{
	return(m1*m2);
}

float divide(float m1,float m2)
{
	return(m1/m2);
}

 

Verry good.
Would you mind joining and writting a tutorial at my forums. SEE MY SIG

People hate it when i right a tutorial. I just aint good at telling people how to do something like that.


Thanks

 

I would love to but I see no topics on your forums and so how you know people hate what you write. I also had something similar thinking when I started but thanks to G4EF that made me think otherwise.

 

very good stuff man

 

i got another option in your program

Code:

#include <stdio.h><br>
#include <conio.h><br>
main()<br>
{<br>
  float n1,n2,s,d,p,q;<br>
  clrscr();<br> 
  printf("\n Enter two nos");<br>
  scanf("%f%f"&n1,&n2);<br>
  s=n1+n2;<br>
  d=n1-n2;<br>
  p=n1*n2;<br>
  q=n1/n2;<br>
  printf("\n Sum %f",s);<br>
  printf("\n Difference %f",d);<br>
  printf("\n Product %f",p);<br>
  printf("\n Quotient %f",q);<br>
  getch();<br>
 return(0);<br>
}

 

sorry for that reply....this is the real one

Code:

#include <stdio.h>
#include <conio.h>
main()
{
  float n1,n2,s,d,p,q;
  clrscr();
  printf("\n Enter two nos");
  scanf("%f%f"&n1,&n2);
  s=n1+n2
  d=n1-n2;
  p=n1*n2;
  q=n1/n2;
  printf("\n Sum %f",s);
  printf("\n Difference %f",d);
  printf("\n Product %f",p);
  printf("\n Quotient %f",q);
  getch();
  return(0);
}

 

your program doesnt work if a space is given between operan & operator
2+5=7

but
2 + 5

doesnt work

 

Great stuff!

 

Nicely done

 

This program is very nicely done.
I like this program. I have try it. it is very good.

 

what about a supermarket service to calculate prices of goods with fixed prices. with a cashier log in

 

what about a supermarket service to calculate prices of goods with fixed prices. with a cashier log in

 

tnx but i think we needed a top source from calculator
Specal thanks

 

Hy, I begun studying c++ a few days ago and I came across this topic and decided to write a similar program in c++...

The code was a bit inspired from the original c calculator

Anyway, I would love to read your feedback ^^

Code:

#include <cstdlib>
#include <cstdio>
#include <iostream>


using namespace std;

double x;
double y;
double multi(double x, double y);
double divi(double x, double y);
double sub (double x, double y);
double add(double x, double y);


int main(int argc, char *argv[])
{
    char a, z;
    for(;;)
{
    cin>> x; cin>> z; cin>>y;
if (z=='*'){cout<<"=" <<multi (x,y)<< endl;}
if (z=='/'){cout<<"=" <<divi (x,y)<< endl;}
if (z=='-'){cout<<"=" <<sub (x,y)<< endl;}
if (z=='+'){cout<<"=" <<add (x,y)<< endl;}

cout<<"Would you like to do another operation? [y/n]";
cin>>a;
if 
(a!='y')
{break;}
}
    system("PAUSE");
    return EXIT_SUCCESS;
}
double multi (double x, double y)
{return x*y;}
double divi (double x, double y)
{return x/y;}
double sub (double x, double y)
{return x-y;}
double add (double x, double y)
{return x+y;}

Cheers!

 

gud,....................

 

:worried: hi ,thanks for program ,but this program in the line 25 give error . error : cannot call 'main' from within the program in function main().
please help me .
sorry for level low language.

 

i will try it later,anyway thank u for that code

 

hai do i know which editor is best now in c / c++ languages. is better Microsoft or Turbo C