how to get output in terminal when debugging a c++ file? - c++

I am learning debugging C++ file from Udemy .I want to debug a code but I was getting output in external console , so I set external terminal to false . Now I am not getting any output while debugging neither in terminal nor in output option . Please help me I am new to debugging
C++ Code
#include<iostream>
using namespace std;
int main(){
int num{100};
cout<<"Hello from Project 2 "<<endl;
cout<<"Enter a Number : ";
cin>>num;
cout<<"The number you entered : "<<num;
return 0;
}
Launch.json
{
// Use IntelliSense to learn
// about possible attributes.
// Hover to view descriptions
// of existing attributes.
// For more information, visit:
// https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "g++.exe - Build and debug active file",
"type": "cppdbg",
"request": "launch",
"program": "C:\\Users\\mahir\\OneDrive\\Documents\\C++ debugging Udemy\\project2\\main2.exe",
// There I have got error Property keys must be doublequotedjsonc
"args": [],
"stopAtEntry": false,
"cwd": "${fileDirname} ",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"miDebuggerPath": "C:\\MinGW\\bin\\gdb.exe",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
],
"preLaunchTask": "C/C++: g++.exe build active file"
}
]
}

Related

C++ Program: read file and write file by VS Code in Ubuntu 16.04 can't find the file path

I wrote a c++ example program in VS code on ubuntu 16. The example si to read file and write file. However, the compiler reports that it can not find the file path. I don' know what happened. Here is my main.cpp file:
#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<fstream>
using namespace std;
void test01(){
char* filename ="/home/mark2/Desktop\\source.txt";
ifstream ism(filename, ios::in); // only read function to open the file
//ifstream ism;
//ism.open(filename, ios::in);// only read function to open the file
if(!ism){
cout<<"file open failed"<<endl;
}
//read file
char ch;
while(ism.get(ch)){
cout<<ch;
}
//file has beem opened, now close the file
ism.close();
}
int main(){
test01();
return 0;
}
And here is my launch.json file;
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "g++ - Build and debug active file",
"type": "cppdbg",
"request": "launch",
"program": "${fileDirname}/${fileBasenameNoExtension}",
"args": [],
"stopAtEntry": false,
"cwd": "${fileDirname}",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
],
"preLaunchTask": "C/C++: g++ build active file",
"miDebuggerPath": "/usr/bin/gdb"
}
]
}
I don't what should I do to next. Could you please give me some advice?
Thanks!

How to result Unable to open 'strtol_l.c' when debugging in VSCode

I'm trying to debug a simple Cpp program that reads an input file and make a graph from it. However, when trying to debug on VSCode, this error pops up:
Unable to open 'strtol_l.c': Unable to read file '/build/glibc-ZN95T4/glibc-2.31/stdlib/strtol_l.c' (Error: Unable to resolve non-existing file '/build/glibc-ZN95T4/glibc-2.31/stdlib/strtol_l.c').
Here is my program:
int main(int argc, char *argv[])
{
unordered_map<int, vector<int>> graph;
ifstream input("input1.txt");
string row;
while (getline(input,row)) { >>> where the error is
istringstream iss(row);
int node1, node2;
if (iss >> node1 >> node2) {
graph[node1].push_back(node2);
graph[node2].push_back(node1);
}
}
input.close();
}
here is my launch.json:
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "(gdb) Launch",
"type": "cppdbg",
"request": "launch",
"program": "${workspaceFolder}/a.out",
"args": ["input1.txt"],
"stopAtEntry": false,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
]
}
]
}
A picture of the error:
Any hint?

I'm Unable to debug my C++ code in VSCode

I'm trying to debug my C++ file but whenever I press the Run >> start debugging option, it just runs and quit without any errors or anything. My program is not running...
Here's my code:
#include <vector>
#include <string>
#include <iostream>
using namespace std;
int main()
{
int rows, question;
std::string length;
cin >> rows;
for (int i = 0; i < rows; i++)
{
cin >> length;
}
return 0;
}
Here's what it shows in the terminal after clicking on debug:
cmd /C "c:\Users\intel\.vscode\extensions\ms-vscode.cpptools-0.29.0\debugAdapters\bin\WindowsDebugLauncher.exe --stdin=Microsoft-MIEngine-In-oxw2rz3u.v3w --stdout=Microsoft-MIEngine-Out-5me5n3jp.wq2 --stderr=Microsoft-MIEngine-Error-wg1xnokk.ddw --pid=Microsoft-MIEngine-Pid-kfv0gezm.4wp --dbgExe=C:\MinGW\bin\gdb.exe --interpreter=mi "
C:\Users\intel\Desktop\Python programs>
Here's what it shows in the output window:
Here's my tasks.json:
{
"version": "2.0.0",
"_runner": "terminal",
"tasks": [
{
"type": "shell",
"label": "C/C++: g++.exe build active file",
"command": "C:\\MinGW\\bin\\g++.exe",
"args": [
"-g",
"${file}",
"-o",
"${fileDirname}\\${fileBasenameNoExtension}.exe"
],
"options": {
"cwd": "${workspaceFolder}"
},
"problemMatcher": [
"$gcc"
],
"group": {
"kind": "test",
"isDefault": true
}
}
]
}
Here's my launch.json
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "(gdb) Launch",
"type": "cppdbg",
"request": "launch",
"program": "${fileDirname}/a.exe",
"args": [],
"stopAtEntry": false,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"miDebuggerPath": "C:\\MinGW\\bin\\gdb.exe",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
]
},
{
"name": "Python: Current File",
"type": "python",
"request": "launch",
"program": "${file}",
"console": "integratedTerminal"
},
]
}
I am using a windows machine and a MinGW for C++
I use VSCode to develop in C++ too, but not tryed to use with MinGW yet. I use it with MSVC and GCC (Linux).
My launch configuration is sligh different from yours, using GCC.
{
"linux": {
"MIMode": "gdb",
"miDebuggerPath": "/usr/bin/gdb",
"setupCommands": [
{
"description": "Enable pretty-printing",
"text": "-enable-pretty-printing"
}
]
},
"name": "Run gcc (linux) x64 debug",
"request": "launch",
"program": "/projects/CPP/GHDWS/build/gcc-linux/x64/debug/GHDWS",
"cwd": "/projects/CPP/GHDWS/build/run",
"args": [],
"preLaunchTask": "Build gcc x64 debug",
"type": "cppdbg",
"externalConsole": false
},
I made my own system build, that automatically configure VSCode to your project. If you're willing, you can try use it.
CppMagic

It's no any response after starting debugging

According to the instruction: https://code.visualstudio.com/docs/cpp/config-mingw, .vscode files are set. Then, I add the MinGW64 path to the system path. But, when I start debugging, VS Code hangs and no finish, I also scan the Console by the steps: Help->Toggle Developer Tools, and the Console displays the following error, and I don't know how to solve.
enter image description here
The followings are my source code and both JSON files:
// source code file
#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main()
{
vector<string> msg {"Hello", "C++", "World", "from", "VS Code", "and the C++ extension!"};
for (const string& word : msg)
{
cout << word << " ";
}
cout << endl;
}
// launch.json
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "g++.exe build and debug active file",
"type": "cppdbg",
"request": "launch",
"program": "${fileDirname}\\${fileBasenameNoExtension}.exe",
"args": [],
"stopAtEntry": false,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": true,
"MIMode": "gdb",
"miDebuggerPath": "C:\\Program Files (x86)\\mingw-w64\\i686-7.2.0-win32-sjlj-rt_v5-rev1\\mingw32\\bin\\gdb.exe",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
],
"preLaunchTask": "g++.exe build active file"
}
]
}
// tasks.json
{
"version": "2.0.0",
"tasks": [
{
"type": "shell",
"label": "g++.exe build active file",
"command": "C:\\Program Files (x86)\\mingw-w64\\i686-7.2.0-win32-sjlj-rt_v5-rev1\\mingw32\\bin\\g++.exe",
"args": [
"-g",
"${file}",
"-o",
"${fileDirname}\\${fileBasenameNoExtension}.exe"
],
"options": {
"cwd": "C:\\Program Files (x86)\\mingw-w64\\i686-7.2.0-win32-sjlj-rt_v5-rev1\\mingw32\\bin"
},
"problemMatcher": [
"$gcc"
],
"group": {
"kind": "build",
"isDefault": true
}
}
]
}

VSCODE gdb on windows show empty file on debug

I try to setup helloworld project with vscode and gdb for cpp.
I uses msys2.
It all sets just fine, project compiles and runs, but i have problem with debugging it.
Here my launch.json
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "(gdb) Launch",
"type": "cppdbg",
"request": "launch",
"program": "${workspaceFolder}/helloworld.exe",
"args": [],
"stopAtEntry": true,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": true,
"MIMode": "gdb",
"miDebuggerPath": "C:/msys64/usr/bin/gdb.exe",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
]
}
]
}
and my demo project
#include <iostream>
#include <vector>
#include <string>
using namespace std;
int main(int argc, char** argv)
{
vector<string> msg {"Hello", "C++", "World", "from", "VS Code!"};
for (const string& word : msg)
{
cout << word << " ";
}
cout << endl;
}
But when i run debug, instead source file it show just empty file, i figure out that new file created in
C:\c\Users\user\projects\helloworld\
so there a problem with path there.
How to fix it?
I use wrong gdb.
You need install other version of gdb:
pacman -S mingw-w64-x86_64-gdb
and use it
"miDebuggerPath": "C:/msys64/mingw64/bin/gdb.exe",