C String Practice Exercises and Small Projects

These C string assignments are designed for practice after learning character arrays, the null terminator and common string functions. The original Plus2net exercise inventory is preserved below, with legacy/non-standard functions clearly identified.

Basic String Exercises Top ↑

Receive a string and display the same string.
Find the length of a string without using strlen().
Print a string with one blank space between each character.
Print a string vertically, with one character per line.
Print a string in reverse order.

Advanced String Exercises Top ↑

Copy the nth character of a string when the nth position is supplied as a number.
Copy a string without using strcpy().
Search a string for a character and display its position when found.
Search for one string inside another string.
Print a string vertically with one character per line.
Print a string in reverse order.
Truncate or remove content from a chosen position.
Search for a character inside a string and display the position.
Remove the final character when it is a comma (,).
Extract the part of a string between two chosen input characters.
Search for a string inside another string and display the position when found.
Extract the part of a string between two input strings.

Truncate a String at a Chosen Position Top ↑

The original page described this as deleting the string from the nth position. Assigning '\0' at that index actually terminates the string there, so the visible suffix is truncated.

#include <stdio.h>

int main(void) {
    size_t position = 12;
    char text[] = "welcome to C programming";

    if (position < sizeof text) {
        text[position] = '\0';
    }

    printf("%s\n", text);
    return 0;
}

List Every Character Vertically with Its Position Top ↑

#include <stdio.h>

int main(void) {
    char text[] = "welcome to C programming";

    for (size_t i = 0; text[i] != '\0'; i++) {
        printf("i = %zu => %c\n", i, text[i]);
    }

    return 0;
}

Delete One Character and Shift the Remaining String Top ↑

This variation demonstrates a true single-character deletion rather than truncation.

#include <stdio.h>
#include <string.h>

int main(void) {
    char text[] = "welcome to C programming";
    size_t position = 7;
    size_t length = strlen(text);

    if (position < length) {
        for (size_t i = position; i < length; i++) {
            text[i] = text[i + 1];
        }
    }

    printf("%s\n", text);
    return 0;
}

String Tutorial Hub Top ↑

Return to the complete C Strings hub for all string functions, search/parsing pages, legacy-function notes and practice links.