Random int not so random

i have switch set select random values this...

code:

- (ibaction)randomresultgenerator {  	int rnumber = rand() % 20;  	  	switch (rnumber) {  			  	case 0:  	result.text = @"a.j.";  	break;  		  	case 1:  	result.text = @"abacus";  	break;    etc...  

every time launch app runs through same order. there doing wrong generate random number? run in random order, same random order every time.

 

you haven't seeded random number generator.

 

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