Platform device resource source code analysis

Platform device resource source code analysis questions-Linux general technology-Linux programming and kernel information, the following is a detailed reading. When studying the driver of the platform device today, view the source code of the kernel to obtain the resource function as follows/drivers/base/platform. c:
Struct resource * platform_get_resource (struct platform_device * dev,
Unsigned int type, unsigned int num)
{
Int I;

For (I = 0; I <dev-> num_resources; I ++ ){
Struct resource * r = & dev-> resource ;

If (type = resource_type (r) & num -- = 0)
Return r;
}
Return NULL;
}
As marked in red above, I don't understand why I create pointer variables in the for () loop. if there are multiple loops, the same variables will be created again? Should it be changed:
Struct resource * platform_get_resource (struct platform_device * dev,
Unsigned int type, unsigned int num)
{
Int I;
Struct resource * r;

For (I = 0; I <dev-> num_resources; I ++ ){
R = & dev-> resource;

If (type = resource_type (r) & num -- = 0)
Return r;
}
Return NULL;
}