C PROGRAMMING PROGRAM • STRINGS

Copy a String Without strcpy()

Learn how to copy a string without strcpy() using a clear C program.

BeginnerStringsCharacter arraysLoops

PROBLEM UNDERSTANDING

Input and expected output

Sample input

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Sample output

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COMPLETE C PROGRAM

Complete C implementation

#include <stdio.h>

int main(void)
{
    char source[200], destination[200];
    int index = 0;

    printf("Enter text: ");
    fgets(source, sizeof source, stdin);
    while (source[index] != '\0') {
        destination[index] = source[index];
        index++;
    }
    destination[index] = '\0';
    printf("Copied text: %s", destination);
    return 0;
}

CURRENT STEP

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SELECTED LINE

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EXPECTED OUTPUT FOR THE SAMPLE

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0%Step 0 of 0

PROGRAM EXPLANATION

Algorithm and explanation

Read the required input values.
Copy each character including the terminating null character into another array.
Display the computed result.

Copy each character including the terminating null character into another array.

EFFICIENCY

Time and space complexity

Time complexity

O(n)

Auxiliary space

O(n)

DEBUGGING CHECKLIST

Common mistakes

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Use the correct format specifier for every variable.

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Initialize variables before using their values.

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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.