C Tutorial/stdlib.h/rand
rand
Item Value Header file stdlib.h Declaration int rand(void); Function generates a sequence of pseudorandom numbers. Each time it is called, an integer between zero and RAND_MAX is returned. RAND_MAX will be at least 32,767.
<source lang="cpp">#include <stdlib.h>
#include <stdio.h>
int main(void)
{
int i;
for(i=0; i<10; i++){
printf("%d \n", rand());
}
return 0;
}</source>
Seed a random number
<source lang="cpp">#include <stdio.h>
- include <stdlib.h>
int main(){
int x;
int seed = 11;
srand(seed);
puts("Behold! 100 Random Numbers!");
for(x=0;x<100;x++){
printf("%d \n", rand());
}
return(0);
}</source>
Behold! 100 Random Numbers! 737120851 1813584622 279403949 1005612121 535583813 2076485441 1183398096 520913449 1154512877 1059637032 741048201 1735789551 1316165860 2091205829 608409849 2043917862 358495264 197486820 1978930740 19687262 608908788 411176766 946129446 727061997 2077503173 1575409043 653838784 1321679137 804509431 1206711916 1315236785 1501041106 2061242451 1959636594 472651030 1602552878 492843352 1968585005 378058371 436935333 712273104 364281872 1606570689 1874954196 490475024 696747194 166772383 1367120714 1112737848 32333121 691207997 793647892 340950235 741361510 935019051 427446745 1514759277 1430185376 528113855 855007105 1319659740 1198466770 1992406528 1702459445 1442334882 1720821640 1129825415 1058388889 1258471118 1660062129 1225867189 1550593068 279245380 1224789394 641368484 878709921 1064686765 1555571968 9653544 839812884 1548263274 2015299471 1313206600 821952515 1312932582 446790851 1064401295 655545570 1543054014 1175887620 944409743 1725662249 463822590 16861250 446033920 907172554 1167012078 103393064 633888716 881115352
