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C vs C++

C vs C++. Networking CS 3470, Section 1 Sarah Diesburg. Hello World. C++ cout &lt;&lt; “Hello World!” &lt;&lt; endl; C printf(“Hello World!<br>”);. Dynamic Array/Memory Allocation. C++ int *x_array = new int[10]; delete[] x_array; C int *x_array = malloc(sizeof(int) *10); free(x_array);. Structs.

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C vs C++

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  1. C vs C++ Networking CS 3470, Section 1 Sarah Diesburg

  2. Hello World • C++ cout << “Hello World!” << endl; • C printf(“Hello World!\n”);

  3. Dynamic Array/Memory Allocation • C++ int *x_array = new int[10]; delete[] x_array; • C int *x_array = malloc(sizeof(int) *10); free(x_array);

  4. Structs • After defining a struct, how do you declare a new instance? struct a_struct { int x; }; • C++ a_struct struct_instance; • C struct a_struct struct_instance;

  5. Typedefs • To get around typing so much, use a typedef typedef struct a_struct { int x; }a_struct_type; • Now declare it a_struct_type struct_instance;

  6. Declaring Variables • C++ for(int i=0; i<condition; i++){ } • C int i; for(i=0; i<condition; i++) { }

  7. Boolean • No boolean type in C • You can simulate through enum typedef enum {FALSE, TRUE} bool; • Why is false before true? typedef enum {FALSE=0, TRUE=1} bool;

  8. Boolean Example #include <stdio.h> #include <stdlib.h> typedefenum {FALSE, TRUE} bool; main() { bool flag1=TRUE; bool flag2=FALSE; if(flag1 > flag2) printf("The truth wins again!\n"); return 0; }

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