Compilare: user.c:15:23: warning: return type defaults to ‘int’ [enabled by default] FILE*ifl__;FILE*ofl__;filread(char*ft,...){va_list ap;va_start ^ user.c:31:37: warning: return type defaults to ‘int’ [enabled by default] (ap);return 1;}va_end(ap);return 0;}filwrite(char*ft,...) ^ user.c: In function ‘filwrite’: user.c:34:49: warning: assignment makes pointer from integer without a cast [enabled by default] (ap,char*);fputs((char*)p,ofl__);break;case'd':p=va_arg ^ user.c: At top level: user.c:55:1: warning: return type defaults to ‘int’ [enabled by default] main(){bothopen("flip");filread("dd",&n,&m);int i;long int sum=0,temp; ^ user.c: In function ‘filread’: user.c:18:1: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] ((char*)p,INT_MAX,ifl__);break;case'l':p=va_arg(ap,long ^ user.c:19:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] int*);fscanf(ifl__,"%ld\n",(long int*)p);break;case'L':p=va_arg ^ user.c:20:27: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] (ap,long long int*);fscanf(ifl__,"%lld\n",(long long ^ user.c:21:47: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] int*)p);break;case'd':p=va_arg(ap,int*);fscanf(ifl__,"%d\n", ^ user.c:23:42: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] (p=va_arg(ap,int*);i--;p=(int*)p+1)fscanf(ifl__,i?"%d ":"%d\n", ^ user.c:25:22: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] (long int*)p+1)fscanf(ifl__,i?"%ld ":"%ld\n",(long int*)p);else ^ user.c:27:16: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] int*)p+1)fscanf(ifl__,i?"%lld ":"%lld\n",(long long ^