In project.pro,  I did the following:

CONFIG += c++17
SOURCES += \
    main.cpp 

In main.cpp, the code is very simple:

#include "iostream"
int main(int argc, char *argv[])
{
    std::cout << "Test output" << std::endl;
}
 

note: `using msvc_64 sdk`

When I select "Debug" and choose "Start debugging of setup project," nothing appears in the console except for "xxx finished." However, "Run Project" works fine, and even using QTextStream(stdout) doesn’t output anything either.

I tried using the MinGW SDK, and it worked as expected.