Compilare: user.c: In function ‘main’: user.c:121:5: warning: implicit declaration of function ‘close’ [-Wimplicit-function-declaration] close(fin); ^~~~~ user.c:108:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &T); ^~~~~~~~~~~~~~~~~~~~~ user.c:111:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &D); ^~~~~~~~~~~~~~~~~~~~~ user.c:112:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", v); ^~~~~~~~~~~~~~~~~~~~ user.c:113:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", v+1); ^~~~~~~~~~~~~~~~~~~~~~ user.c:114:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", v+2); ^~~~~~~~~~~~~~~~~~~~~~ user.c:115:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", v+3); ^~~~~~~~~~~~~~~~~~~~~~