Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Generating random number in a range in C
Here we will see how to generate random number in given range using C. To solve this problem, we will use the srand() function. The current time will be used to seed the srad() function.
This function cannot generate random number in any range, it can generate number between 0 to some value. So for it, we have to follow one trick. We will generate random number in between 0 to (upper – lower + 1), then add the lower limit for offsetting.
Example
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void generate_random(int l, int r, int count) { //this will generate random number in range l and r
int i;
for (i = 0; i < count; i++) {
int rand_num = (rand() % (r - l + 1)) + l;
printf("%d ", rand_num);
}
}
main() {
int lower = 10, upper = 15, count = 15;
srand(time(0)); //current time as seed of random number generator
generate_random(lower, upper, count);
printf("\n");
}Output
15 11 13 10 13 10 15 11 14 12 12 13 12 13 14
Updated on: 30-Jul-2019
3K+ Views
Advertisements