Compilare: user.c:5:6: warning: return type of ‘main’ is not ‘int’ [-Wmain] void main(void){ ^ user.c: In function ‘main’: user.c:10:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(read, "%d", &a); ^ user.c:11:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(read, "%d", &b); ^