Compilare: main.c: In function 'main': main.c:50:2: warning: implicit declaration of function 'system' [-Wimplicit-function-declaration] system("pause"); ^~~~~~ main.c:28:2: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &T); ^~~~~~~~~~~~~~~~~~~ main.c:41:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &N); ^~~~~~~~~~~~~~~~~~~