convert from char to integer value

[souphmars]

i input as a char-how do i change the character which is a number to it its value so i can add it

 

[ArkM]

In C/C++ char type is an integral (i.e. integer) type. You can add/subtract chars as integers, for example:

char ch = '2';
int  n;
...
n = ch - '0'; /* n == 2 now */

Be careful: there are three char types in these languages:
1. signed char
2. unsigned char
3. char /* as is: may be treated as signed or unsigned */
For ANSI codes (0..127) is no matter what's a simple char treatment in the implementation. You may use explicit cast to (unsigned char) in proper cases (more portability)...

 

[BlackDice]

I think what you're talking about refers more specifically to this. If the user inputs a string (in an editbox) that is "1234", to get the actual integer value, use the function atoi(). That converts a character string to an integer.

bdiamond