水晶报表选择带字符串的专家过滤器

Question

如何在选择专家中按字符串过滤Crystal报表数据库？

#include <vector>
#include <iostream>

unsigned long primes = 0;

int main() {
    int number = 1'000'000'000;
    std::vector<bool> sieve(number,false);
    sieve[0] = sieve[1] = true;

    for(int i = 2; i<number; i++) {
        if(!sieve[i]) {
            ++primes;
            for (int temp = 2*i; temp<number; temp += i)
                sieve[temp] = true;
        }
    }
    std::cout << "found: " << primes << " Primes\n";
    return 0;
}

在水晶报表中选择专家后：

string usuario;

Visual Studio Community 2017 + ODBC mysql