Create structure

struct MyStructure { // structure declaration
  int myNum; // member (int variable)
  char myLetter; // member (char variable)
}; // end the structure with a semicolon

Create a struct variable called s1

struct myStructure {
  int myNum;
  char myLetter;
};
int main() {
  struct myStructure s1;
  return 0;
}