Compilare: user.c: In function ‘Cautbin’: user.c:40:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:45:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.c:48:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i]); ^ user.c:50:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&m); ^ user.c:53:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] {fscanf(f,"%d%d",&op,&x); ^ user.c: In function ‘Cautbin’: user.c:17:19: warning: ‘mij’ may be used uninitialized in this function [-Wmaybe-uninitialized] { int st=1,dr=n,mij; ^ user.c:29:19: warning: ‘mij’ may be used uninitialized in this function [-Wmaybe-uninitialized] { int st=1,dr=n,mij; ^