+ 4

Can someone explain to me how the rand() work ? Language C++ . I don’t get it ! What do we use it for ?

16th Aug 2018, 1:13 AM
Abir Arsalane
Abir Arsalane - avatar
4 Respuestas
+ 5
if you use only rand() it will help you generate pseudo-random numbers (not really generated randomly but following a specific way so you may keep getting the same number over and over again ) ----> use : • rand() % 100; // returns a number between 0 and 100 • rand()%100 +1 //here +1 is used to skip 0 and generate a number between 1 and 100 so if you replace 1 by 50 it will generate a number between 50 and 100 note : to generate truly random numbers you need more lines of code. this website may be useful for you : cplusplus.com
16th Aug 2018, 1:33 AM
hamza benhammouda
hamza benhammouda - avatar
+ 4
thank you so much !
16th Aug 2018, 1:37 AM
Abir Arsalane
Abir Arsalane - avatar
+ 2
thank you Robin
16th Aug 2018, 2:45 PM
Abir Arsalane
Abir Arsalane - avatar
0
rand() can be used to generate random numbers. /* rand example: guess the number */ #include <stdio.h> /* printf, scanf, puts, NULL */ #include <stdlib.h> /* srand, rand */ #include <time.h> /* time */ int main () { int iSecret, iGuess; /* initialize random seed: */ srand (time(NULL)); /* generate secret number between 1 and 10: */ iSecret = rand() % 10 + 1; do { printf ("Guess the number (1 to 10): "); scanf ("%d",&iGuess); if (iSecret<iGuess) puts ("The secret number is lower"); else if (iSecret>iGuess) puts ("The secret number is higher"); } while (iSecret!=iGuess); puts ("Congratulations!"); return 0; }
27th Jan 2019, 9:13 PM
D@h1🃏
D@h1🃏 - avatar