C :: User Input With Forks

So im working with forks and creating 2 fork processes. One child and parent. What im trying to get the child to ask me for a value. Then the parent would start to figure out the value and keep trying. Once it figures it out its tells them you got it and simply stops the program. I cant seem to get the program to keep guessing and stop when the number is found which sends a sigint. Here's what i have so far.

Code:
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <stdbool.h>

int main() {
int j, i,pid;

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