Compilare: user.c: In function ‘main’: user.c:23:21: warning: unused variable ‘j’ [-Wunused-variable] int n, y, x, i, j; ^ user.c:23:18: warning: unused variable ‘i’ [-Wunused-variable] int n, y, x, i, j; ^ user.c:23:15: warning: unused variable ‘x’ [-Wunused-variable] int n, y, x, i, j; ^ user.c: In function ‘calcul’: user.c:16:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:25:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.c:28:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &y); ^