Compilare: user.c: In function ‘main’: user.c:107:5: warning: implicit declaration of function ‘close’ [-Wimplicit-function-declaration] close(f); ^ user.c:73:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); ^ user.c:76:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &w[i]); ^