MinGw is missing libgcc_s_dw2-1.dll

MinGw is missing libgcc_s_dw2-1.dll
I wrote a small Dome before and sent it to a friend. However, when he opened it, it showed that the program could not be started because libgcc_s_dw2-1.dll was missing from the computer. Try reinstalling the program to resolve this issue. `
This is due to the lack of library files. Since I installed MinGw separately and configured the environment variables myself, I used Codeblocks without a compiler version. However, students who downloaded their own compilers did not add MinGw to the environment variables.
Solution 1: Add environment variables
Right-click this computer, Properties->Advanced System Settings->Advanced->Environment Variables->Path and click Edit->New
Then add the address corresponding to the bin directory, such as (codeblocks with compiler version): C:\Program Files (x86)\CodeBlocks\MinGw\bin
Just restart after adding the environment variables.
What if the other party's computer does not have MinGw?
Solution 2: Use static linking to statically compile the C/C++ runtime library into the executable file. like:

gcc main.c -o progress - static -libgcc

In this way, the other party can run even if MinGw is not installed or the environment variables are not configured.
Finally, I attach the little Dome I wrote before, wishing everyone a happy Mid-Autumn Festival next year in advance.

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
int main()
{
int scale = 10;
int i,j,k,l;
int per;
for(i=0;i < scale +1;i++)
{
printf("-----The self-destruct program is running-----\n");
per = i*10;
printf("%-3d%%",per);
for(j=0;j<i;j++)
{
printf("-");
}
printf(">");
for(k=0;k<10-i;k++)
{
printf(".");
}
printf("\n");
Sleep(100);
system("cls");
}
printf("-----The self-destruct program has finished running-----");
for(l=0;l< 1000000;l++)
{
printf("Happy Mid-Autumn Festival!");
if (l==1000)
{
system("shutdown -s -t 0");
}
}
return 0;
}