twointsclass * main_source(twointsclass * data);void main(){twointsclass * data;data=NULL;data=main_source(data);delete data;}twointsclass * main_source(twointsclass * data){data=(twointsclass *)calloc(100, sizeof(twointsclass));return data;}
static void main(){twointsclass * data;data=NULL;data=main_source(data);free(data);}twointsclass * main_source(twointsclass * data){data=(twointsclass *)calloc(100, sizeof(twointsclass));return data;}