Compilare: user.c: In function ‘quicksort’: user.c:11:5: warning: implicit declaration of function ‘srand’ [-Wimplicit-function-declaration] srand(time(NULL)); ^ user.c:12:5: warning: implicit declaration of function ‘rand’ [-Wimplicit-function-declaration] pivot = rand()%(dr - st + 1)+st; ^ user.c: In function ‘main’: user.c:40:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.c:43:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^