Programming Forums > Application Development > C

h2311 · Apr 8th, 2005, 10:35 AM

hi guys, im a new member here. i hope i can find a solution for my problem.
i have been assigned a project in C language that requires us to build a non-scientific calculator. The user should give the instructions as a sequence ending with sentinel �=� and the program should calculate the result without considering the precedence of the operators. the sequence can be any length. The operators that must be used are:
+ (addition), - (subtraction), * (multiplication), / (division), ^ (power)

my problem is that i could not make the program calculate the results.... i enter the sequence ending with the sentinel '=' but the calculations are not done...
i will be so glad if anyone can helpppp
thanks

brkstf · Apr 8th, 2005, 12:39 PM

you get a lot more help if you post some code that you have worked on.

my c is rusty, but in c++, this is really easy. cin>> an int, then a char, then another int.

use the character (+-*/^) as an argument to a doMath kinda function, and ints 1 and 2 as operands. in c++, a simple version (without bad input catching) can be written in about 10-15 lines of code. should be about the same in c. i'm just trying to remember how the get and getch work. i'm really out of practice.

Infinite Recursion · Apr 8th, 2005, 1:55 PM

lets see what you have done so far...

Encryption · Apr 8th, 2005, 7:48 PM

Show your code, and then, if you haven't already done so, learn arrays and vectors pretty well.(Vectors may not be necesarry).

Mjordan2nd · Apr 8th, 2005, 8:23 PM

I was thinking just get it as one long String. Use the +-/*^ characters to split the string into 4 ways, first integer, operator, 2nd integer an equal sign, and then use an atoi() function to get the ints you want, then just do the proper calculations. It sounds like you can basically disregard the equal sign and almost consider it always there. Of course, like others have said, I don't know exactly how far you've gotten since you haven't posted any of your code. Also, I could be making this harder than it is.

Benoit · Apr 8th, 2005, 8:50 PM

Welcome to the forums dude

Simple program...Post the code you have so far and we'll help you out

anandt4u · Apr 9th, 2005, 12:32 AM

Quote:

Originally Posted by Encryption

Show your code, and then, if you haven't already done so, learn arrays and vectors pretty well.(Vectors may not be necesarry).

are vectors available in C?? i thought it was java and C# feature..can someone enlighten me about that

uman · Apr 9th, 2005, 12:36 AM

They are in C++, not in C. (You could program them yourself in C without too much trouble)

anandt4u · Apr 9th, 2005, 12:46 AM

Quote:

Originally Posted by uman

They are in C++, not in C. (You could program them yourself in C without too much trouble)

can you tell me how to use vectors in gcc...tx

Cerulean · Apr 9th, 2005, 4:58 AM

Quote:

can you tell me how to use vectors in gcc...tx

Well by looking for a nice third party vector thingummawat. You probably don't want to write your own if you're asking how to use them in a compiler.

Apr 8th, 2005, 10:35 AM	#1
h2311 Newbie Join Date: Apr 2005 Posts: 2 Rep Power: 0	a new member favoring a help hi guys, im a new member here. i hope i can find a solution for my problem. i have been assigned a project in C language that requires us to build a non-scientific calculator. The user should give the instructions as a sequence ending with sentinel �=� and the program should calculate the result without considering the precedence of the operators. the sequence can be any length. The operators that must be used are: + (addition), - (subtraction), * (multiplication), / (division), ^ (power) my problem is that i could not make the program calculate the results.... i enter the sequence ending with the sentinel '=' but the calculations are not done... i will be so glad if anyone can helpppp thanks

Apr 8th, 2005, 1:55 PM	#3
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	lets see what you have done so far... __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Apr 8th, 2005, 8:23 PM	#5
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	I was thinking just get it as one long String. Use the +-/^ characters to split the string into 4 ways, first integer, operator, 2nd integer an equal sign, and then use an atoi()* function to get the ints you want, then just do the proper calculations. It sounds like you can basically disregard the equal sign and almost consider it always there. Of course, like others have said, I don't know exactly how far you've gotten since you haven't posted any of your code. Also, I could be making this harder than it is. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

Apr 8th, 2005, 8:50 PM	#6
Benoit Expert Programmer Join Date: Sep 2004 Location: Ontario, Canada Posts: 555 Rep Power: 5	Welcome to the forums dude Simple program...Post the code you have so far and we'll help you out __________________ Johnny was a chemist's son but Johnny is no more, for what Johnny thought was H2O was H2SO4

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Apr 8th, 2005, 12:39 PM	#2
brkstf Programmer Join Date: Feb 2005 Posts: 89 Rep Power: 4	you get a lot more help if you post some code that you have worked on. my c is rusty, but in c++, this is really easy. cin>> an int, then a char, then another int. use the character (+-*/^) as an argument to a doMath kinda function, and ints 1 and 2 as operands. in c++, a simple version (without bad input catching) can be written in about 10-15 lines of code. should be about the same in c. i'm just trying to remember how the get and getch work. i'm really out of practice.

Apr 9th, 2005, 12:36 AM	#8
uman Expert Programmer Join Date: Dec 2004 Posts: 794 Rep Power: 4	They are in C++, not in C. (You could program them yourself in C without too much trouble)

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Programming Forums > Application Development > C

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