1//How to create random integers within a specific range in C langauge.
2
3srand(time(0))
4number = (rand() % (upper - lower + 1)) + lower
5//upper = max number
6//lower = least number
1#include <stdio.h>
2#include <stdlib.h>
3#include <time.h>
4
5int main(void)
6{
7 int number, min, max;
8
9 system("cls");
10 printf("What is the minimum number?\n");
11 scanf("%d", &min);
12 printf("What is the maximum number?\n");
13 scanf("%d", &max);
14
15 printf("\nThe numbers:\n");
16 srand(time(0));
17 number = (rand() % (max - min + 1)) + min;
18 printf("%d ", number);
19
20 return 0;
21}
1#include <time.h>
2#include <stdlib.h>
3
4srand(time(NULL)); // Initialization, should only be called once.
5int r = rand(); // Returns a pseudo-random integer between 0 and RAND_MAX.
1/** This random number generator using your
2 own computer time to generate random
3 number, the program is working so quick
4 so you can't use a for loop to generate
5 multiple numbers. even with a delay the
6 program will run in a small jumps from
7 number to another so the only way to
8 properly generate random numbers is
9 running the code multiple times **/
10
11//C libraries statement
12#include <stdio.h>
13#include <stdlib.h>
14#include <time.h>
15
16//Driver program
17int main(void)
18{
19 //Declaring the variables
20 int number, min, max;
21
22 //Getting the input from the user
23 system("cls");
24 printf("What is the minimum number?\n");
25 scanf("%d", &min);
26 printf("What is the maximum number?\n");
27 scanf("%d", &max);
28
29 //Calculating and printing the random number
30 printf("\nThe numbers:\n");
31 srand(time(0));
32 number = (rand() % (max - min + 1)) + min;
33 printf("%d ", number);
34
35 //Ending the program
36 return 0;
37}
38
39///The code itself without the details:
40
41#include <stdio.h>
42#include <stdlib.h>
43#include <time.h>
44
45int main(void)
46{
47 int number, min, max;
48
49 system("cls");
50 printf("What is the minimum number?\n");
51 scanf("%d", &min);
52 printf("What is the maximum number?\n");
53 scanf("%d", &max);
54
55 printf("\nThe numbers:\n");
56 srand(time(0));
57 number = (rand() % (max - min + 1)) + min;
58 printf("%d ", number);
59
60 return 0;
61}
1#include <stdio.h>
2#include <time.h>
3
4int main(){
5 /*this is the seed that is created based on how much
6 time has passed since the start of unix time.
7 In this way the seed will always vary every time the program is opened*/
8 srand(time(NULL));
9 int max;
10 int min;
11 int n;
12 printf("give me the minimum number?\n");
13 scanf("%d", &min);
14 printf("give me the maximum number?\n");
15 scanf("%d", &max);
16 //method to derive a random number
17 n = rand() % (max - min + 1) + min;
18 printf("random number:%d", n);
19 return 0;
20}
21