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Dynamic Memory Management Assignment Solution in C


  1. Create pointers for a character, a string, an integer, a floating-point number, and an array of 10 integers.
  2. For each pointer (5 of them), dynamically allocate the memory and then assign values as follows. You can use malloc and or calloc.
    • Use your name for the string (array of characters). (First Name: Manny)
    • Use 100 for the integer.
    • The character should be an ‘A’.
    • The floating-point number should be 98.76
    • The array of integers should be the numerals 0 through 9.
  3. Print out values for all five dynamically allocated variables.
  4. Free all dynamically allocated memory.
  5. The output should look something like this:

Character: A

Integer: 100

String: Caryl

Floating Point: 98.76

Array of Integers: 0 1 2 3 4 5 6 7 8 9

Solution:

#include < stdio.h> #include < stdlib.h> #include < string.h> int main(int argc, char **argv) { /* * Create pointers for a character, a string, an integer, * a floating-point number and for an array of 10 integers */ char *chr_ptr; char *str_ptr; int *int_ptr; float *float_ptr; int *int_arr; /** * For each pointer (5 of them), dynamically allocate the memory * and then assign values as follows */ chr_ptr = calloc(1, sizeof(char)); str_ptr = calloc(6, sizeof(char)); int_ptr = calloc(1, sizeof(int)); float_ptr = calloc(1, sizeof(float)); int_arr = calloc(10, sizeof(int)); /** * Assign values */ *chr_ptr = 'A'; memset(str_ptr, 0, 6); strcpy(str_ptr, "Manny"); *int_ptr = 100; *float_ptr = 98.76; for (int i = 0; i < 10; i++) { int_arr[i] = i; } /** * Print out values for all five dynamically allocated variables */ printf("Character: %c\n", *chr_ptr); printf("Interder: %d\n", *int_ptr); printf("String: %s\n", str_ptr); printf("Floating Point: %.2f\n", *float_ptr); printf("Array of Intergers:"); for (int i = 0; i < 10; i++) { printf(" %d", int_arr[i]); } printf("\n"); /** * Free all dynamically allocated memory */ free(chr_ptr); free(str_ptr); free(int_ptr); free(float_ptr); free(int_arr); /** * j o h n n y t u o t - g m a i l - c o m */ return 0; }

Output:

Dynamic Memory 1