buffer overflow to point stack pointer to specific location

Question

I am trying to do buffer overflow attack.

I have disabled address space layout randomization (ASLR) using command: sudo sysctl -w kernel.randomize_va_space=0

Instead of crashing the program I want to print the "Holla.. Holla.." Statement in the code by using buffer overflow to overwrite return address on the stack to point to target() function address which contains the printf() statement and print Holla.. Holla... instead of crashing the program

I am using the following code:

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

void target(){
    printf("Holla.. Holla..\n");
    exit(0);
}

void prompt(){
    char buf[100];

    gets(buf);
    printf("You entered: %s\n", buf);

}

int main(){
    prompt();

    return 0;
}