Remove spaces in C: solved exercise

Remove spaces in C: solved exercise

This exercise is scheduled for daily publication and follows the standard site structure: statement, solution, and expected output.

Problem statement

Solve the practical case and verify the console output.

C solution

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#include <stdio.h>

int main(void) {
    char s[] = "c en rigle dev";
    int j = 0;
    for (int i = 0; s[i] != '\0'; i++)
        if (s[i] != ' ') s[j++] = s[i];
    s[j] = '\0';
    printf("%s\n", s);
    return 0;
}

Expected output

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cenrigledev

Common mistakes

  • Not validating standard-function return values.
  • Ignoring edge cases for indices, pointers, or buffers.
  • Skipping example-based test runs before publishing.

Practical use

In-place string manipulation is common in parsers, user input sanitization, and protocol processing.

Guided practice and full book

If you want a complete path with progressive difficulty:

FAQ

Is this exercise useful for C exams and technical interviews?

Yes. It targets patterns that commonly appear in practice assignments, technical interviews, and C programming exams.

Where can I keep practicing with more solved C exercises?

In Programming in C in 100 Solved Exercises and C Exercises. Kindle Unlimited: View on Amazon.

How should I practice this exercise type to improve faster?

Start with small inputs, run edge cases (empty, one item, max capacity), then rewrite the solution from scratch without copying.