Compilare: user.c: In function ‘myNth_element’: user.c:40:5: warning: implicit declaration of function ‘rand’ [-Wimplicit-function-declaration] int pivot = petq[rand() % (e - b + 1) + b]; ^ user.c: In function ‘main’: user.c:64:5: warning: implicit declaration of function ‘srand’ [-Wimplicit-function-declaration] srand(time(NULL)); ^ user.c: In function ‘getChar’: user.c:16:14: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, Dragoste, f); ^