Make sure that Cards::init() is called and returns true before calling Cards::load. The array accessed by Cards::load will consist of three empty strings in case Cards::init() is not called, or if it returns false. 1 solved How to print std::string array with printf in c++? [closed]
Use QString as primary string type: QString result = QString(“apg -q -n %1 -x %2 -y %3”).arg(n).arg(x).arg(y); Or use a QTextStream to assemble everything. QString result; QTextStream ts(&result); ts << “apg -q -n ” << n << ” -x ” << x; To use std::string with .arg(): std::string x = “xxx”; QString result = QString(“xxx … Read more
Use rfind to get the location of the last slash then substr to return the right side of the string. Since substr‘s second argument defaults to “the end of the string” you only need to provide the beginning position: #include <string> std::string GetURLFilePath(const std::string& url) { auto last_slash_location = url.rfind(“https://stackoverflow.com/”); if(last_slash_location == std::string::npos || last_slash_location … Read more