Compilare: user.c: In function ‘main’: user.c:59:18: warning: unused variable ‘j’ [-Wunused-variable] {int a[10][10],i,j,n,m; ^ user.c:59:16: warning: unused variable ‘i’ [-Wunused-variable] {int a[10][10],i,j,n,m; ^ user.c: In function ‘citeste’: user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&a[i][j]); ^ user.c: In function ‘linie’: user.c:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘coloana’: user.c:37:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘sum’: user.c:56:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:66:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^