Compilare: user.c: In function ‘main’: user.c:27:13: warning: format ‘%d’ expects argument of type ‘int *’, but argument 3 has type ‘char *’ [-Wformat=] fscanf(fin, "%d", &a[i][j]); ^ user.c:21:40: warning: unused variable ‘contorlin’ [-Wunused-variable] int n, i, j, cj, ci, x, contorcol, contorlin, contor; ^ user.c:21:29: warning: unused variable ‘contorcol’ [-Wunused-variable] int n, i, j, cj, ci, x, contorcol, contorlin, contor; ^ user.c:21:26: warning: unused variable ‘x’ [-Wunused-variable] int n, i, j, cj, ci, x, contorcol, contorlin, contor; ^ user.c:21:22: warning: unused variable ‘ci’ [-Wunused-variable] int n, i, j, cj, ci, x, contorcol, contorlin, contor; ^ user.c:21:18: warning: unused variable ‘cj’ [-Wunused-variable] int n, i, j, cj, ci, x, contorcol, contorlin, contor; ^ user.c:23:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.c:27:19: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a[i][j]); ^