C++ Tutorial: Your First Program, Input/Output, Control Structures, and Functions

And c++?

What will we do? C vs JAVA Dev-C++ tutorial and your first program C++ structure Reading input/output Flow Control (if, for, while) array function (method) debugging

Hello World (Day 1 Morning) C JAVA #include <stdio.h> import java.io.*; int main(int argc, char* argv[]) { printf("Hello, CP!\n"); return 0; } class HelloWorldApp { public static void main(String[] args) { System.out.println("Hello World!"); } }

C vs JAVA C code DOES NOT need to be in a class No filename restriction C and JAVA have very similar syntax if, for, while is the same Data type is almost the same (int, char, bool, float, double, etc) Function and method is the same For c++, function does not need to be in a class We don t really use any class in algorithm :D

Output (printf) printf(format_string, value ); command What you get printf( YES ); YES printf( YES %d ,12); YES 12 printf( %d is more than%d ,24,12); 24 is more than12 printf( floating point %f ,2.3457); floating point 2.3457 printf( test\ntest\nhaha ); test test haha printf( string %s is possible , haha ); string haha is possible

input(scanf) Use the same format string scanf(format_string, &variable ); #include <stdio.h> int main() { int age, w; printf("Please enter your age and weight ); scanf("%d %d", &age, &w); printf( your age = %d \n your weight is %d\n ,age,w); }

Condition Statement If statement The same as java #include <stdio.h> int main() { int age; printf( "Please enter your age" ); scanf( "%d", &age ); if ( age < 100 ) { printf ("You are NOT old!\n" ); } else { printf ("You are old!\n" ); } return 0; }

While loop While loop The same as java #include <stdio.h> int main() { int x = 0; while ( x < 10 ) { printf("x = %d\n",x); x++; } return 0; }

For loop For loop The same as java #include <stdio.h> int main() { for (int i = 0;i < 10;i++) { printf( i = %d\n",i); } return 0; }

Practice Lab 1 (http://www.nattee.net/files-dae/Algo-Lab1.pdf) Prob 0,1 Lab 2 (http://www.nattee.net/files-dae/Algo-Lab2.pdf) Prob 0,1 hw00e (BMI) http://www.nattee.net/~dae/algo/prob/hw00b_fibo/problem.pdf hw00c (drawbox) http://www.nattee.net/~dae/algo/prob/hw00c_drawbox/problem.pdf hw00d (time after) http://www.nattee.net/~dae/algo/prob/hw00d_timeafter/problem.pdf

Array in C++ (Day 1 Afternoon) (almost) the same as java #include <iostream> int main() { int fibo[100]; fibo[0] = 1; fibo[1] = 1; for (int i = 2;i < 100;i++) { fibo[i] = fibo[i-1] + fibo[i-2]; } printf("%d\n",fibo[99]); return 0; }

2D Array Example #include <stio.h> int main() { int x; int y; int array[8][8]; for ( x = 0; x < 8; x++ ) { for ( y = 0; y < 8; y++ ) array[x][y] = x * y; } printf("Array Indices\n"); for ( x = 0; x < 8;x++ ) { for ( y = 0; y < 8; y++ ) printf("[%d][%d] = %d\n",x,y,array[x][y]); printf("\n"); } return 0; }

More practice Lab 2 Prob 2 hw00f http://www.nattee.net/~dae/algo/prob/hw00f_aminmax/problem.pdf

Debugging (Day 2 Morning) Follow guide in Lab 3 (http://www.nattee.net/files-dae/Algo-Lab3.pdf)