Compilare: user.c: In function ‘subsumamat’: user.c:20:34: warning: unused variable ‘k’ [-Wunused-variable] int i,st,dr,max=0,v[1000],sum=0,k; ^ user.c: In function ‘main’: user.c:36:28: warning: unused variable ‘smax’ [-Wunused-variable] int n,m,a[1000],b[1000],i,smax=0,c[1000][1000],j; ^ user.c:39:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d %d", &n, &m); ^ user.c:41:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d", &a[i]); ^ user.c:43:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%d", &b[j]); ^