Compilare: user.c: In function ‘getNumberOfElements’: user.c:9:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:44:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fp,"%d",&n); ^~~~~~~~~~~~~~~~~~ user.c:49:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fp,"%d",v+i); ^~~~~~~~~~~~~~~~~~~