C PROGRAMMING PROGRAM • STRUCTURES, UNIONS & ENUMS
Demonstrate Memory Sharing in a union
Learn how to demonstrate memory sharing in a union using a clear C program.
PROBLEM UNDERSTANDING
Input and expected output
Sample input
No input required
Sample output
Integer = 42 Text = C language
COMPLETE C PROGRAM
Complete C implementation
#include <stdio.h>
#include <string.h>
union Value { int integer; double decimal; char text[20]; };
int main(void)
{
union Value value;
value.integer = 42;
printf("Integer = %d\n", value.integer);
strcpy(value.text, "C language");
printf("Text = %s\n", value.text);
return 0;
}CURRENT STEP
Select Start to walk through the important lines.
SELECTED LINE
No line selected
EXPECTED OUTPUT FOR THE SAMPLE
Integer = 42 Text = C language
Step 0 of 0
PROGRAM EXPLANATION
Algorithm and explanation
- Read the required input values.
- Write and read one union member at a time because every member occupies the same storage.
- Display the computed result.
Write and read one union member at a time because every member occupies the same storage.
EFFICIENCY
Time and space complexity
Time complexity
O(1)
Auxiliary space
O(1)
DEBUGGING CHECKLIST
Common mistakes
Check this
Use the correct format specifier for every variable.
Check this
Initialize variables before using their values.
Check this
Check braces, semicolons and input order carefully.
Try it yourself
Practice: Run the program with the sample input, predict its output, and then test one boundary case of your own.