Modifying Elements
Part of the Fundamentals section of Coddy's C journey — lesson 55 of 63.
In C, you can modify elements of an array after they've been initialized.
Create an integer array with 5 elements:
int numbers[5] = {10, 20, 30, 40, 50};To modify an element, use the array name with the index in square brackets:
// Change the third element (index 2) to 35
numbers[2] = 35;After executing the above code, the array will contain:
[10, 20, 35, 40, 50]
You can also use variables as indices:
int index = 4;
numbers[index] = 55; // Changes the fifth element (index 4) to 55Now the array contains:
[10, 20, 35, 40, 55]
Challenge
EasyWrite a function named updateScore that takes:
- An integer array representing the scores of 5 players
- A player number (1 to 5)
- A new score value
The function should update the score of the specified player and then print all scores in the format: "Scores: [score1, score2, score3, score4, score5]"
Remember that arrays in C are 0-indexed, so player 1 corresponds to index 0.
Cheat sheet
To modify array elements in C, use the array name with the index in square brackets:
int numbers[5] = {10, 20, 30, 40, 50};
numbers[2] = 35; // Changes third element (index 2) to 35You can also use variables as indices:
int index = 4;
numbers[index] = 55; // Changes fifth element (index 4) to 55Try it yourself
#include <stdio.h>
void updateScore(int scores[], int playerNumber, int newScore) {
// Write your code here
}
int main() {
int scores[5];
// Read the current scores
for (int i = 0; i < 5; i++) {
scanf("%d", &scores[i]);
}
// Read the player number and new score
int playerNumber, newScore;
scanf("%d %d", &playerNumber, &newScore);
// Call the updateScore function
updateScore(scores, playerNumber, newScore);
return 0;
}
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Fundamentals
3Operators
Arithmetic OperatorsModulo OperatorIncrement/DecrementAssignment OperatorsRelational OperatorsLogical Operators Part 1Logical Operators Part 2Logical Operators Part 3Recap Challenge