generate random number in C language

i wrote a program to find a random number in C programming language.here i get only number 1 as my random number.can any one help me to solve this.i mentioned my code below.

#include <stdio.h>
#include <stdlib.h>

int getRandomNumber();

int main()
{
printf("%d\n",getRandomNumber());
return 0;
}

int getRandomNumber(){

int n;
n=rand()%5+1;
return n;
}