Replace Character

Easy Strings
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Problem Statement

Write a C program to replace all occurrences of a specific character with another character in a string.

Input Format

First line: string. Second line: character to replace and new character separated by a space.

Output Format

Print the modified string.

Constraints

Length <= 100

Sample Input

banana
a
o

Sample Output

bonono

Explanation

Iterate through the string and substitute every occurrence of the target character with the replacement character.

Starter Code

#include <stdio.h>

int main() {
    char str[101];
    if (scanf("%100s", str) == 1) {
        char old_ch, new_ch;
        scanf(" %c %c", &old_ch, &new_ch);
        // Write your code here to replace character
    }
    return 0;
}

Limits

  • Time Limit: 1s
  • Memory Limit: 256MB

Embedded C Programming

Updated: March 15, 2026
Intermediate

Embedded systems rely on efficient low-level programming to interact directly with hardware. In this course, you will learn how to write practical Embedded C programs used in real microcontroller-based systems. Rather than focusing only on theory, this course follows a practice-driven approach. Each lesson includes hands-on coding exercises that simulate real firmware development tasks used