C Cpp File Operations

FILE* fp

//using MS Visual Studio(2019)
if ((fopen_s(&fp, "<path>", "<mode>"))){
printf("Cannot open the file.\n");    
exit(<error code>);
}

//using other compiler
if((fp=fopen("<path>", "mode")) == NULL ){
  printf("Fail to open the file.\n");
  exit(<error code>);
}