C Programming Absolute Beginner's Guide (3rd Edition)

printf("The first array value is %d.\n", vals[0]); printf("The second array value is %d.\n", vals[1]); printf("The third array v ...

pName = "Theodore M. Brooks"; Tip The only reason string assignment works is that C puts all your program’s string literals into ...

Yes, this is a little tedious. You might have to read this section again later after you get more comfortable with pointers and ...

Arrays of Pointers If you want to use a bunch of pointers, create an array of them. An array of pointers is just as easy to defi ...

"Silver Linings Playbook", "Zero Dark Thirty"}; int movieratings[9]; // A corresponding array of 9 integers // for movie ratings ...

for (i=0; i < ctr; i++) { printf("%s rated a %d!\n", movies[i], movieratings[i]); } return(0); } Here is a sample output from ...

FIGURE 25.2 The movies array contains pointers to strings. See, even though there is no such thing as a string array in C (becau ...

26. Maximizing Your Computer’s Memory In This Chapter Thinking of the heap Understanding why you need the heap Allocating the h ...

in this book has used the heap. Thinking of the Heap Now that you’ve learned what the heap is—the unused section of contiguous m ...

program can’t just expand the array at runtime. Some programmers (like you) have to change the array definition and recompile th ...

function allocates heap memory, and the free() function deallocates heap memory. Tip Be sure to include the stdlib.h header file ...

satisfy your allocation request): Allocates the number of bytes you request and makes sure no other program can overwrite that ...

Besides defining an array at the top of main(), what have you gained by using malloc()? For one thing, you can use the malloc() ...

When you’re done with the heap memory, give it back to the system. Use free() to do that. free() is a lot easier than malloc(). ...

// Next section of code would probably be calculations related // to the per-city data entry // Don't forget to deallocate the h ...

main() { int i, aSize; int * randomNums; time_t t; double total = 0; int biggest, smallest; float average; srand(time(&t)); ...

{ smallest = randomNums[i]; } } average = ((float)total)/((float)aSize); printf("The biggest random number is %d.\n", biggest); ...

Don’t always rely on regular arrays to hold a program’s data. Sometimes a program needs data for just a short time, and using t ...

27. Setting Up Your Data with Structures In This Chapter Defining a structure Putting data in structure variables Arrays and p ...

Not only is a structure like a cardfile, but you also can see that a structure is a lot like a paper form with blanks to fill in ...