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#include <iostream>
#include <random>

void doJobWithRandomFail() {
        std::random_device rd;
        std::default_random_engine gen = std::default_random_engine(rd());
        std::uniform_int_distribution<int> dis(1,10);

        if (dis(gen) < 8) {
                throw std::runtime_error("Fail to do the job");
        }
}

void doJobWithRetry(int max_tries) {
        bool success = false;
        for (int count=0; success == false && count <= max_tries; count++) {
                std::cout << "Do job, try count: " << count << std::endl;
                try {
                        doJobWithRandomFail();
                } catch (const std::runtime_error &err) {
                        continue;
                }
                success=true;
        }
}

int main() {
        doJobWithRetry(20);
        return 0;
}