FILE * b_main_source(FILE * data);void _main(){FILE * data;data=NULL;data=b_main_source(data);fclose(data);}FILE * b_main_source(FILE * data){data=fopen("file.txt", "w+");return data;}
FILE * b_main_source(FILE * data);static void main(){FILE * data;data=NULL;data=b_main_source(data);if (data!=NULL){fclose(data);}}FILE * b_main_source(FILE * data){data=fopen("file.txt", "w+");return data;}