I have just included <random> in my code and I am getting error
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.3.sdk/usr/include/c++/v1/__random/poisson_distribution.h:145:23 No member named 'trunc' in namespace 'std'
#include <cmath>
#include <iostream>
#include <random>
using namespace std;
int main() {
std::cout << "Hello I am " << __cplusplus << std::endl;
return 0;
}
How are you testing this? I put the code you posted into a new Xcode project — created from the macOS > Command Line Tool template, selecting C++ as the language — and it builds and runs just fine:
Hello I am 202002
This is using Xcode 14.3 on macOS 13.3.1.
If you’re not using Xcode, I recommend the test procedure described in this post. That’ll tell you whether your command-line tool setup is working in general.
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"
Same I have done , used "Command Line Tool template, selecting C++ as the language". When I don't include random I get output "Hello I am 201703".
Mac OS - 13.3 Xcode - 14.3
I also selected C++ Language Dialect in build setting as "C++17".
Apparently this works when I run from command line. Following is my Makefile. But I need to debug code so I thought to build in xcode and getting error when I include random.
CXX = clang++
CXXFLAGS = -std=c++17
INCLUDES = -I/opt/homebrew/Cellar/boost/1.81.0_1/include
LIBS = -L/opt/homebrew/Cellar/boost/1.81.0_1/lib -lboost_graph
SRC = main.cpp
EXECUTABLE = main
all: $(EXECUTABLE)
$(EXECUTABLE): $(SRC)
@echo "Compiling ..."
@$(CXX) $(CXXFLAGS) $(INCLUDES) $< -o $@ $(LIBS) 2>&1 | tee compile.log
.PHONY: clean
clean:
@echo "Cleaning ....."
rm -f $(EXECUTABLE)
@echo "Cleanup Complete. "
run:
@echo "Running ....."
@./$(EXECUTABLE) 2>&1 | tee run.log
@echo "Execution Complete. "
play:
@echo "Displaying graph"
@open erdos_renyi.png
build: clean main run
Apparently this works when I run from command line.
Interesting. Most folks who report problems like this and seeing the reverse, where Xcode works but the command line fails.
I also selected C++ Language Dialect in build setting as "C++17".
Did that change the behaviour? Do you still see the failure when you leave that at its default value?
FYI, it didn’t change things for me. My new command-line tool project works either way.
Try this:
Create a new user account.
Log in as that user.
Run Xcode from there.
Create a new test project.
Try to reproduce the problem with that.
What do you see?
Share and Enjoy
—
Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"