Working Code

#include <stdio.h>

int main()
{
    int age;
    printf("Please enter your age: ");
    fflush(stdout); // Prints to screen or whatever your standard out is
    scanf("%d", &age);
    printf("Your age is: %d\n", age);
    fflush(stdout); // Prints to screen or whatever your standard out is
    return 0;
}

I run this and it is working as expected. If you are using linux os, please follow below command to compile and run.

gcc age.c
./a.out

Please visit here to know more about scanf function in c.

Step 1. Download the MinGW - Minimalist GNU for Windows at SourceForge, link here.

When you download Minimalist GNU for Windows (MinGW), you can choose which packages to install. You should select the following packages:

• mingw-developer-toolkit
• mingw32-base
• mingw32-gcc-g++
• msys-base

Then click on the Installation tab on the top left and click on Apply Changes.

After installation, go to your C Drive where the MinGW is installed, and enter the folders MinGW > bin. Copy the path C:\MinGW\bin

Now search for environment, and enter edit environment variables for your account. screenshot

Next, double-click on Path, click on New, paste the path C:\MinGW\bin, press enter, and click OK.

Verify that it has been installed correctly by opening up Command Prompt and typing in gcc --version. It should give you the current version number.

Step 2. In Visual Studio Code, click on the Extensions tab, search and install Code Runner by Jun Han

Step 3. In the C/C++ Configurations. Make sure the Compiler Path has c:/MinGW/bin/gcc.exe selected. screenshot 2

You can get to it by opening Command Pallet (ctrl+shift+p) typing in C/++: Select a Configuration.. then select Edit Configurations (UI)