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C Exercises: Generate a random number

C Variable Type : Exercise-5 with Solution

Write a C program to generate a random number.

Sample Solution:

C Code:

#include<stdio.h>
#include<stdlib.h>
#include<time.h>

	int main ()
	{
		int number, input;
		/* initialize random seed: */
		srand ( time(NULL) );
		/* Generate a random number: */
		number = rand() % 10 + 1;
		do {
				printf ("\nGuess the number (1 to 10): ");
				scanf ("%d",&input);
				if (number > input)
					printf ("The number is higher\n");
			} while (number!=input);
		printf ("That is correct!\n\n");
		return 0;
	}
	

Sample Output:

Guess the number (1 to 10): 6                                                                                 
The number is higher 

Flowchart:

C Exercises Flowchart: Generate a random number

C Programming Code Editor:

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP