cannot open source file stdio.h C in vscode

I've been trying to learn C recently.When I execute the following code in visual studio code:

#include <stdio.h>int main(){      // variable declaration    int a, b, c;    // user prompts    printf("enter a number\n");    scanf("%d", &a);    printf("enter another number\n");    scanf("%d", &b);    // operation    c = a + b;    // printing    printf("your number is %d", c);    return 0;}

it works fine. But I am given this error:

cannot open source file "stdio.h"

I have properly installed gcc, msys, etc. yet any and all #include header lines give the same error.Here is a image of the error (indent rainbow, material theme, C/C++ and error lens extensions):