READING for Week 0



Notes for lecture 1.

Kernighan and Ritchie, 1.1 1.2 1.3 1.7 



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                         EXERCISES for Week 0


 1. Write a program that prints "hello world" 5 times.

 2. Write a program that reads in two numbers and prints their sum.

 3. Write a program that reads a decimal integer and prints out its 
    value in octal.

 4. Write a program that reads an octal integer and prints out its 
    value in decimal.

 5. Write a program that reads in a number and prints out "hello world"
    that many times.

For discussion:

    How would you fix your program from exercise 2 to print "TOO BIG" 
    if one or both of the numbers typed (or the resulting sum) is
    too big to be represented in the computer?



































                    Answers to Exercises for Week 0


1.

          #include <stdio.h>
          main()
            {
              printf("hello, world\n");
              printf("hello, world\n");
              printf("hello, world\n");
              printf("hello, world\n");
              printf("hello, world\n");
            }



2.
          #include <stdio.h>
          main()
            {
              int x, y;
              scanf("%d %d", &x, &y);
              printf("%d\n", x+y);
            }
3.
          #include <stdio.h>
          main()
            {
              int n;
              scanf("%d", &n);
              printf("%o\n", n);
            }

4.
          #include <stdio.h>
          main()
            {
              int n;
              scanf("%o", &n);
              printf("%d\n", n);
            }

5.
          #include <stdio.h>
          main()
            {
              int i, n;
              scanf("%d", &n);
              for (i = 0; i < n; i++)
                printf("hello, world\n");
            }