Calculator using PIC - Electronic Circuits Projects Diagrams Free

MrNobody · 14th August 2008, 11:48 AM

Hey, I'm trying to do a simple calculator to add up 2 sets of numbers together using C18.
The number is entered using a keypad and displayed onto the LCD.

Lets say I want to calculate 101 + 50, I would first enter '1', '0', '1' using the keypad. The character '1', would then be stored in the first position of an array followed by '0' and then '1' in the 3rd position of the array. If I want to use the MCU's arithmetic function to add the numbers, i need to convert these characters in the array into 'int variable' of 101.

So, my question is how do I convert character '1', '0', '1' stored in the char array into int 101. Is there any built in function that enables me to do that apart from writting my own code..? Thanks.

colin mac · 14th August 2008, 11:54 AM

You can convert string to int using the atoi function.
http://www.cplusplus.com/reference/c...dlib/atoi.html

MrNobody · 14th August 2008, 11:59 AM

ah.. thanks for that..

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14th August 2008, 11:48 AM	(permalink)
MrNobody	Calculator using PIC Hey, I'm trying to do a simple calculator to add up 2 sets of numbers together using C18. The number is entered using a keypad and displayed onto the LCD. Lets say I want to calculate 101 + 50, I would first enter '1', '0', '1' using the keypad. The character '1', would then be stored in the first position of an array followed by '0' and then '1' in the 3rd position of the array. If I want to use the MCU's arithmetic function to add the numbers, i need to convert these characters in the array into 'int variable' of 101. So, my question is how do I convert character '1', '0', '1' stored in the char array into int 101. Is there any built in function that enables me to do that apart from writting my own code..? Thanks.

14th August 2008, 11:54 AM	(permalink)
colin mac	You can convert string to int using the atoi function. http://www.cplusplus.com/reference/c...dlib/atoi.html Last edited by colin mac; 14th August 2008 at 11:57 AM.

14th August 2008, 11:59 AM	(permalink)
MrNobody	ah.. thanks for that..