• ben <zander echotech.ca> Aug 19 2002
• user domain.invalid Aug 19 2002
• ben <zander echotech.ca> Aug 19 2002

Hello Everybody

I hope stupid questions are welcome here.. I can't figure this out. I am 
trying to figure out how to convert chars to integers..

char *script = "0";
int number = (char) *script;

This returns the ascii number. (48 i think).
I need the number can someone help..

Also how do you do it with bigger numbers.

char *string[] = "50";

Something like that.. 

Ben

 

ben wrote:
 Hello Everybody
 
 I hope stupid questions are welcome here.. I can't figure this out. I am 
 trying to figure out how to convert chars to integers..
 
 char *script = "0";
 int number = (char) *script;
 
 This returns the ascii number. (48 i think).
 I need the number can someone help..
 
 Also how do you do it with bigger numbers.
 
 char *string[] = "50";
 
 Something like that.. 
 
 Ben
 
  


atoi is your friend.

Manual example
Header: stdlib.h

Prototype

int atoi(const char *nptr);

Description

The atoi function converts the string pointed to by nptr to an 
integer. The string may have leading spaces, tabs, and + or -. 
Conversion stops on the first unrecognized character. If there 
are no recognized characters, the result is 0.

Return Value

Returns the integer value derived from converting the string. 
Zero is returned if the input string has no recognizable characters.

Compatibility

DOS, Windows 3.x, Phar Lap, DOSX, Win32

See Also

atof, atol, _atold, _ecvt, _fcvt, scanf, strtol

Example

/*    Example of atoi  */
#include <stdio.h>
#include <stdlib.h>

void main()
{
    int result;
    char *test1 = "310";
    char *test2 = "No Number";

    result = atoi (test1);
    printf ("Test1 is %d\n", result);

    result = atoi (test2);
    printf ("Test2 is %d\n", result);
}


Output

Test1 is 310
Test2 is 0

Thank you so much.. 

Ben

user domain.invalid wrote:

 ben wrote:
 Hello Everybody
 
 I hope stupid questions are welcome here.. I can't figure this out. I am
 trying to figure out how to convert chars to integers..
 
 char *script = "0";
 int number = (char) *script;
 
 This returns the ascii number. (48 i think).
 I need the number can someone help..
 
 Also how do you do it with bigger numbers.
 
 char *string[] = "50";
 
 Something like that..
 
 Ben
 
  


 atoi is your friend.
 
 Manual example
 Header: stdlib.h
 
 Prototype
 
 int atoi(const char *nptr);
 
 Description
 
 The atoi function converts the string pointed to by nptr to an
 integer. The string may have leading spaces, tabs, and + or -.
 Conversion stops on the first unrecognized character. If there
 are no recognized characters, the result is 0.
 
 Return Value
 
 Returns the integer value derived from converting the string.
 Zero is returned if the input string has no recognizable characters.
 
 Compatibility
 
 DOS, Windows 3.x, Phar Lap, DOSX, Win32
 
 See Also
 
 atof, atol, _atold, _ecvt, _fcvt, scanf, strtol
 
 Example
 
 /*    Example of atoi  */
 #include <stdio.h>
 #include <stdlib.h>
 
 void main()
 {
     int result;
     char *test1 = "310";
     char *test2 = "No Number";
 
     result = atoi (test1);
     printf ("Test1 is %d\n", result);
 
     result = atoi (test2);
     printf ("Test2 is %d\n", result);
 }
 
 
 Output
 
 Test1 is 310
 Test2 is 0