Compilare: user.c: In function ‘main’: user.c:8:23: warning: unused variable ‘c’ [-Wunused-variable] int n,i,sum=0,j,t,c,k,l; ^ user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&n); ^ user.c:11:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&t); ^ user.c:13:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d",&v[j]); ^