Lab 1


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Lab 1

  1. 1. 1 UNIVERSITI TUN HUSSEIN ONN MALAYSIA FACULTY OF MECHANICAL AND MANUFACTURING ENGINEERING BTI 10202: COMPUTER PROGRAMMING LAB 1 : Using Integrated Development Environment (IDE) NAME : _________________________________ MATRICS NO.: _______________ DATE : _________ (MARKS)Objectives: Learn to use the IDE 1. Write a C program and compile it 2. Compilation and Linking error exercises 3. Running the program 4. DebuggingProcedures: 1. Go to menu bar File New Source File (left click). (Figure 1) Figure 1
  2. 2. 22. When a blank screen appears, save the source file using File Save As. Save the file as Lab1_1.c.3. Type in the below program in the Editor screen. /*Program 1*/ #include<stdio.h> main() { char name[30]; int born, x,y; printf("What is your name: "); scanf("%s",name); printf("nnWhich year were you born? 19"); scanf("%d", &born); for(x=born+1,y=1;x<=99;++x,++y) { printf("nHello! %sn",name); printf("nAt 19%d",x); printf("nYou are %d years oldn",y); system("Pause"); } return 0; }4. Remember to save your program frequently to prevent data loss. After finish typing, click the menu bar Execute Compile. If the program is error free then the IDE will tell that the compile status is Done. (Figure 2)5. Next, click Execute Run. A command prompt window will appear. (Figure 3)
  3. 3. 3 Figure 2Figure 3
  4. 4. 46. Add a new source file and type the below program and save as Lab1_2.c /*Program to find the average of 5 numbers*/ #include<stdio.h> main() { int count; //variable to count 5 numbers float value, avg; //variables for value and average float total=0; //set the total to start with 0 clrscr(); //start with fresh screen printf("n**Program to Compute the Average**nn"); printf("Insert your 5 numbers:n"); for (count=1;count<>5;count++) { printf("nnInsert value %d>", count); scan("%f",&value); total=total-value; //add the given values } //find the average and print on screen avg=total/5.0; printf("nThe average is = %.1fn",avg); getch(); //wait until key is pressed return 0; }7. Compile the program.8. View the error messages at the Compiler tab at the bottom of your screen. Determine the line at which error occurs. Otherwise double click at the Error message. List the error messages. (Figure 4) __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________
  5. 5. 5 __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ __________________________________________________________________ Figure 49. Correct the compilation errors until no error messages appear. Corrected program is saved as another name.10. Run the corrected program and follow the on screen procedures. View the answer on screen. What do you think of it? __________________________________________________________________ __________________________________________________________________11. If there are errors in the answer, do debugging.12. Go to the corrected program screen.13. How to debug using Breakpoint. a. Set breakpoint(s) where you want the debugger to stop (otherwise it will just run the program). To set a breakpoint on a line, just click on the gutter (the gray band on the left), or press Ctrl-F5. Set the breakpoints at total=total-value and avg=total/5.0. (Figure 5)
  6. 6. 6 Figure 5b. Launch the debugger, by pressing F8 or clicking the debug button. Observe the source page and the output page. Write down your observation to the lines of your code. ____________________________________________________________ ____________________________________________________________ ____________________________________________________________c. If everything goes well, the program will start, and then stop at the first breakpoint. Then you can step through the code, entering function calls, by pressing Shift-F7 or the "Step Into" button, or stepping over the function calls, by pressing F7 or the "Next Step" button. You can press Ctrl-F7 or the "Continue" button to continue execution till the next breakpoint. At any time, you can add or remove breakpoints.d. You can display your variables (after you reached a breakpoint) in two different ways : - Click on the Add Watch (shortcut: F4) button, type the name of your variable in the dialog, and press OK. If you select a word in the current source file and press F4, it will add a watch of the selected text without asking for a variable name. - Point your mouse over a variable in your source code (if Watch variable under mouse is enabled in Environment OptionsID_ENVIRONMENT) and it will be added to the watch list. (Figure 6)e. Check and compile until the program has no error messages. Copy the final corrected program.
  7. 7. 7 Figure 6. Finalized error free program