Sams Teach Yourself C in 21 Days

Basic Program Control 137

6

20: printf(“\nEnter number %d of 5: “, ctr + 1 );

21: scanf(“%d”, &nbr );

22: }

23:

24: array[ctr] = nbr;

25: ctr++;

26: }

27:

28: for (ctr = 0; ctr < 5; ctr++)

29: printf(“Value %d is %d\n”, ctr + 1, array[ctr] );

30:

31: return 0;

32: }

This program prompts you to enter 5 numbers

Each number should be from 1 to 10

Enter number 1 of 5: 3

Enter number 2 of 5: 6

Enter number 3 of 5: 3

Enter number 4 of 5: 9

Enter number 5 of 5: 2

Value 1 is 3

Value 2 is 6

Value 3 is 3

Value 4 is 9

Value 5 is 2

As in previous listings, line 1 contains a comment with a description of the pro-

gram, and line 3 contains an #includestatement for the standard input/output

header file. Line 5 contains a declaration for an array (named array) that can hold five

integer values. The function main()contains two additional local variables,ctrandnbr

(lines 9 and 10). Notice that these variables are initialized to zero at the same time they

are declared. Also notice that the comma operator is used as a separator at the end of line

9, allowing nbrto be declared as an intwithout restating the inttype command. Stating

declarations in this manner is a common practice for many C programmers. Lines 12 and

13 print messages stating what the program does and what is expected of the user. Lines

15 through 26 contain the first whilecommand and its statements. Lines 18 through 22

also contain a nested whileloop with its own statements that are all part of the outer

while.

LISTING6.4 continued

INPUT/

OUTPUT

ANALYSIS

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