How cast type int with atoi() to Int32

Question

I've got a piece of C code:

Int32 tmp = atoi("314");

It throws an error:

error: Int32 undeclared (first use in this function)

I have no idea why? Could you help me?

Maybe it is problem with #includes:

• sys/socket.h
• netinet/in.h
• arpa/inet.h
• stdio.h
• stdlib.h
• string.h
• strings.h

Answer 1

There is no standard type called Int32. You're probably looking for

int tmp = atoi("314");

If you need a 32-bit integer, the standard type is int32_t defined in inttypes.h or stdint.h.

Answer 2

There is no built-in Int32 type in C. You can include stdint.h for int32_t and uint32_t though. But in this case, you probably want to use int.

int tmp = atoi("314");

Answer 3

If you want Int32 variable you should use

<arm.h>

Check this link. http://pubs.opengroup.org/onlinepubs/009619299/apdxa.htm