C - Many error with #include<cstdio>

[Arash_89]

Hello,

When I declare #include<cstdio> I have many errors.


#include <cstdio>

#include"HeaderA.h"
#include "HeaderB.h"

int main()
{
printf_s("%d", a);
printf_s("%d", b);

return 0;
}
HeaderA.h

int a = 10;



HeaderB.h
int b = 20;





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