Source Code File 13-06_jsonwrite

13-06_jsonwrite.c

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

int main()
{
    json_object *rootobj,*adata,*child;
    const char a_name[] = "address";
    const char s_name[] = "street";
    const char s_value[] = "123 Main St.";
    const char c_name[] = "city";
    const char c_value[] = "Anytown";
    const char t_name[] = "state";
    const char t_value[] = "WY";
    const char z_name[] = "zip";
    const char z_value[] = "98765";
    const char filename[] = "jsontest.json";

    rootobj = json_object_new_object();
    adata = json_object_new_object();
    if( rootobj==NULL || adata==NULL )
    {
        fprintf(stderr,"Initialization failure\n");
        exit(1);
    }

    /* Create and add child objects */
    child = json_object_new_string(s_value);
    json_object_object_add(adata,s_name,child );
    child = json_object_new_string(c_value);
    json_object_object_add(adata,c_name,child );
    child = json_object_new_string(t_value);
    json_object_object_add(adata,t_name,child );
    child = json_object_new_string(z_value);
    json_object_object_add(adata,z_name,child );
    /* add adata object to root object */
    json_object_object_add(rootobj,a_name,adata);

    json_object_to_file(filename,rootobj);
    printf("File %s written\n",filename);

    return(0);
}

Output

File jsontest.json written

Notes

* File contents:

{"address":{"street":"123 Main St.","city":"Anytown","state":"WY","zip":"98765"}}

(A single line of output.)

← 13-05_objectobject.c