Compilare: user.c:26:6: warning: return type of ‘main’ is not ‘int’ [-Wmain] void main() ^ user.c: In function ‘main’: user.c:33:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(p,"%d",&n); ^ user.c:37:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(p, "%d %d", &a, &b); ^