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C Exercises: Put the triple of the previous position starting from the second position of the array

C Basic Declarations and Expressions: Exercise-49 with Solution

Write a C program to read and print the elements of an array of length 7, before print, put the triple of the previous position starting from the second position of the array.
For example, if the first number is 2, the array numbers must be 2, 6, 18, 54 and 162

C Programming: Put the triple of the previous position starting from the second position of the array

Sample Solution:

C Code:

#include <stdio.h>
int main() {
	int n[5], i, x;
	printf("Input the first number of the array:\n");

	scanf("%d", &x);
	for(i = 0; i < 5; i++) 
	{
		n[i] = x;
		x = 3*x;
	}

	for(i = 0; i < 5; i++)
	{
		printf("n[%d] = %d\n", i, n[i]);
	}
	return 0;
}

Sample Output:

Input the first number of the array:                                   
5                                                                      
n[0] = 5                                                               
n[1] = 15                                                              
n[2] = 45                                                              
n[3] = 135                                                             
n[4] = 405

Flowchart:

C Programming Flowchart: Put the triple of the previous position starting from the second position of the array

C programming Code Editor:

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Previous: Write a C program to read and print the elements of an array of length 7, before print replace every negative number, zero with 100.
Next: Write a C program to read an array of length 5 and print the position and value of the array elements of value less than 5.

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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