malloc c++ example
#include <iostream> #include <cstdlib> using namespace std; int main() { int *ptr; ptr = (int*) malloc(5*sizeof(int)); if(!ptr) { cout << "Memory Allocation Failed"; exit(1); } cout << "Initializing values..." << endl << endl; for (int i=0; i<5; i++) { ptr[i] = i*2+1; } cout << "Initialized values" << endl; for (int i=0; i<5; i++) { /* ptr[i] and *(ptr+i) can be used interchangeably */ cout << *(ptr+i) << endl; } free(ptr); return 0; }
malloc() in c and c++
/* malloc example: random string generator*/ #include <stdio.h> /* printf, scanf, NULL */ #include <stdlib.h> /* malloc, free, rand */ int main () { int i,n; char * buffer; printf ("How long do you want the string? "); scanf ("%d", &i); buffer = (char*) malloc (i+1); if (buffer==NULL) exit (1); for (n=0; n<i; n++) buffer[n]=rand()%26+'a'; buffer[i]='\0'; printf ("Random string: %s\n",buffer); free (buffer); return 0; }
cpp malloc
int alloc_size = 10; int* buffer = (int*) malloc (alloc_size); //Allocate memory block which can fit 10 integers
malloc c++
void* malloc(size_t size);
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