Source Code File 12-01_types

12-01_types.c

#include <stdio.h>
#include <stdlib.h>
#include <json-c/json.h>

int main()
{
    const char filename[] = "sample.json";
    const char object_name[] = "assistant";
    json_object *jdata,*objname;
    enum json_type type;

    jdata = json_object_from_file(filename);
    if( jdata==NULL )
    {
        fprintf(stderr,"Unable to process %s\n",filename);
        exit(1);
    }

    if( !json_object_object_get_ex(jdata,object_name,&objname))
    {
        fprintf(stderr,"Unable to find object %s\n",
                object_name);
        exit(1);
    }

    printf("The object type of '%s' is ",object_name);
    type = json_object_get_type(objname);
    switch(type)
    {
        case json_type_array:
            puts("array");
            break;
        case json_type_boolean:
            puts("boolean");
            break;
        case json_type_double:
            puts("double");
            break;
        case json_type_int:
            puts("integer");
            break;
        case json_type_null:
            puts("null");
            break;
        case json_type_object:
            puts("object");
            break;
        case json_type_string:
            puts("string");
            break;
        default:
            puts("unrecognized");
    }

    return(0);
}
Output

The object type of 'assistant' is string
← 11-02_entrylist.c — 12-02_objects.c →