LAB 01: Standard Deviation Lab

1. Compiling C programs
2. keyboard I/O:printf() and scanf() (C) cout/cin (C++),
3. file creation and file i/o: FILE *infile, FILE *outfile, and fopen() (C)
   fscanf() and fprintf() (C)
   ifstream infile() and ofstream outfile() (C++),
4. Constants: #define MAXVALS 100 (C)
   const int MAXVALS=100; (C++)
5. static array: int myarray[MAXVALS]: C and C++
6. dynamic arrays: C:
   int *myarray;
   scanf("%d", &numVals); myarray=(int *)malloc(sizeof(int)*numVals);
   "malloc" stands for "memory allocation"
7. deletion of dynamic arrays
   delete myarray (C++)
   free(myarray) (C)
8. dynamic arrays: C++:
   int *myarray;
   cin >> numVals; myarray=new int[numVals];
9. "Random" numbers in C and C++

Part 1

1. Download these programs to write random numbers to a file: randomNumFile.c, (for C++ see randomNumFile.cpp)
   right click on the C file, choose "Download Link", save as .c (for c++ use .cpp)
2. Compile each program
   C: gcc -o randomNumFile randomNumFile.c
   (C++: g++ -o randomNumFileCPP randomNumFile.cpp)
3. To create a generic executable name, use:
   gcc randomNumfile.c
   This makes an executable named a.out
4. Run each program to create files of 50 or more random numbers
   ./randomNumFile (or ./a.out)
5. Look at the contents of each of the number files to verify the programs worked.

Part 2 - Static and Dynamic Arrays in C

• Write a C program to put 1000 random numbers in an array.
• Print the array of values
• Find the highest and lowest values
• Find the average value
• Find the standard deviation
• Sort the numbers