Compilare: user.c: In function ‘main’: user.c:93:13: warning: implicit declaration of function ‘exit’ [-Wimplicit-function-declaration] exit(1); ^ user.c:93:13: warning: incompatible implicit declaration of built-in function ‘exit’ [enabled by default] user.c:85:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &k); ^ user.c:87:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &x[i], &y[i]); ^