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#import <objc/objc.h>
#import <objc/Object.h>
 
@implementation TestObj
int main()
{
	// your code starts here
 
	NSError *error;
    NSString *json = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"MYURL"] encoding:NSASCIIStringEncoding error:&error];
    if(!error)
    {
        NSData *jsonData = [json dataUsingEncoding:NSASCIIStringEncoding];
        NSArray *jsonDict = [NSJSONSerialization JSONObjectWithData:jsonData
                                                                 options:kNilOptions
                                                                   error:&error];
        NSLog(@"JSON: %@", jsonDict);
    }
    else
    {
        NSLog(@"%@",error);
    }
 
    //code ends here
	return 0;
}
@end

prog.m:5:1: warning: cannot find interface declaration for 'TestObj' [enabled by default]
prog.m: In function 'main':
prog.m:9:2: error: unknown type name 'NSError'
prog.m:10:5: error: unknown type name 'NSString'
prog.m:10:23: error: 'NSString' undeclared (first use in this function)
prog.m:10:23: note: each undeclared identifier is reported only once for each function it appears in
prog.m:10:57: error: 'NSURL' undeclared (first use in this function)
prog.m:10:5: error: cannot find interface declaration for 'NSConstantString'
prog.m:10:96: error: 'NSASCIIStringEncoding' undeclared (first use in this function)
prog.m:13:9: error: unknown type name 'NSData'
prog.m:13:9: warning: invalid receiver type 'int *' [enabled by default]
prog.m:13:9: warning: no '-dataUsingEncoding:' method found [enabled by default]
prog.m:13:9: warning: (Messages without a matching method signature [enabled by default]
prog.m:13:9: warning: will be assumed to return 'id' and accept [enabled by default]
prog.m:13:9: warning: '...' as arguments.) [enabled by default]
prog.m:14:9: error: unknown type name 'NSArray'
prog.m:14:30: error: 'NSJSONSerialization' undeclared (first use in this function)
prog.m:15:74: error: 'kNilOptions' undeclared (first use in this function)
prog.m:17:9: warning: implicit declaration of function 'NSLog' [-Wimplicit-function-declaration]

Standard output is empty