Realloc in C explained easy! 🚢

#coding #programming #cprogramming

00:00:00 intro
00:00:53 setup
00:05:55 realloc demo

// realloc() = Reallocation.
// Resize previously allocated memory
// realloc(ptr, bytes)

[BroCodez]

#include <stdio.h>
#include <stdlib.h>

int main(){

// realloc() = Reallocation.
// Resize previously allocated memory
// realloc(ptr, bytes)

int number = 0;
printf("Enter the number of prices: ");
scanf("%d", &number);

float *prices = malloc(number * sizeof(float));

if(prices == NULL){
printf("Memory allocation failed!\n");
return 1;
}

for(int i = 0; i < number; i++){
printf("Enter price #%d: ", i + 1);
scanf("%f", &prices[i]);
}

int newNumber = 0;
printf("Enter a new number of prices: ");
scanf("%d", &newNumber);

float *temp = realloc(prices, newNumber * sizeof(float));

if(temp == NULL){
printf("Could not reallocate memory!\n");
}
else{
prices = temp;
temp = NULL;

for(int i = number; i < newNumber; i++){
printf("Enter price #%d: ", i + 1);
scanf("%f", &prices[i]);
}

for(int i = 0; i < newNumber; i++){
printf("$%.2f ", prices[i]);
}
}

free(prices);
prices = NULL;

return 0;
}

[clutchyfinger]

You know sh*t is real when Bro warns you it won't be easy

[OhBleh]

"Thank you for your videos man, you don’t know how much you're helping me. I can’t afford extra tuition and since I work while in high school, it’s hard to keep up with everything. I’m currently watching your full Python course and it’s been a lifesaver. In class we’re doing topics like object-oriented programming (OOP), recursion, SQL, relational databases, binary trees, trees in general, graph algorithms, stacks & queues, dictionaries, divide and conquer, dynamic programming, and text search. Would love to see more content on those in Python if you ever cover them! (Python coding specifically—I don't struggle with the concepts as much, it’s just hard to visualize the actual coding process.) No pressure at all, just really appreciate your work 🙏

[Hnxzxvr]

Yk it’s hard when bro code calls it hard

[ShubhamRanjan-ij]

When the full course going to be available?

[valentrix]

In the last example, reallocating from 5 to 3, those 2 "memory blocks" we let go are internally freed right? No memory leaks?

[tierthetora]

if i have

char *n = malloc(10 * sizeof(char));
memset(n, 'h', 9);
n[9] = 0;
realloc(n, 100 * sizeof(char));
free(n);

how can i memset n without deleting the contents?

[cduw]

Amazing vid you’re saving me, is the full course going to be available this week?

[Hnxzxvr]

Bro change it to “explained easy” WE’VE ALREADY SEEN IT MWA HA HA HA

[zyadoreaby]

I am the third comment
Now i can die in peace