char to int problem

cplusplus.com
Information
Documentation
Reference
Articles
Forum

Forum
Beginners
Windows Programming
UNIX/Linux Programming
General C++ Programming
Lounge
Jobs

char to int problem

jimctu (24)

hi everyone...
I have an array of chars:
ifname[50]
in this array i can have anything, letters, numbers, special characteres...
i have to get the ascii code of the char as a integer...
i cannot figure out how to do this...
i tried a lot of things...all went wrong:

sprintf(m1,"%i",ifname[i]); gives me segmentation fault

1 2

m1 = ifname[i];
ch = (int)m1;

gives me strange numbers, such as -1564789432

its very simple, but i have run out of ideas
anyone can help me?

melkiy (131)

how your ml and ch are defined? Give more info.

The code must work:

1 2

for(unsigned char c=0; c<255; ++c)
   printf("%c %d\n", c, (int)c);

helios (9408)

chars are just integers. You don't need to do anything special to get their values:

1 2 3

char s[]="Hello, World!\n";
int ascii=s[0];
std::cout <<ascii<<std::endl;

I can't imagine how you could have gotten -1564789432 from casting a signed 8-bit integer to a bigger signed integer. It just shouldn't happen. At worst, you should have gotten, say, -128 from a 128 character.

Topic archived. No new replies allowed.