Api
哪段程式碼可以讓我檢查是否已找到塊然後執行操作?
我對 C++ 比較陌生,我想知道是否有人可以幫助我。我正在尋找一段程式碼,它將循環直到節點找到一個塊,然後在找到一個塊時列印一個簡單的輸出,如“找到塊”。
謝謝!
您可以簡單地記錄某處的值,並通過重複
bitcoind getblockcount
呼叫查看該值何時發生變化。getblockcount
#include <string> #include <iostream> #include <stdio.h> std::string exec(char* cmd) { FILE* pipe = popen(cmd, "r"); if (!pipe) return "ERROR"; char buffer[128]; std::string result = ""; while(!feof(pipe)) { if(fgets(buffer, 128, pipe) != NULL) result += buffer; } pclose(pipe); return result; } int main(){ int count; count = stoi(exec("bitcoind getblockcount")); for(;;){ int new_count = stoi(exec("bitcoind getblockcount")); while(count < new_count){ std::cout << "Block found." << std::endl; count++; } system("sleep 1"); // There are other ways of sleeping. This is the quick and dirty way. } return 0; }
公平地說,這是對 Luca 的想法和<https://stackoverflow.com/questions/478898/how-to-execute-a-command-and-get-output-of-command-within-c>的抄襲。