5. Program Control
Here I will show you how to make your program repeat parts of code as many times as needed.
This section will use comments to explain what is going on, I don't like going in too much on loops because they are fairly simple and it shouldn't take much to add them to your code.
These programs will just print 10 'x's on the screen.
do{...}while() loops
dowhile.c
-------------------------
#include <stdio.h>
int main()
{
/* Count is created and set to 0 */
int Count = 0
do /* The loop starts */
{
Count++; /* Count is incremented (increased by 1) */
printf("x"); /* prints an x on the screen */
} while (Count < 9) /* tests to see if it needs to
start over again. */
return 0;
}
-------------------------
while(){...} loops
while.c
-------------------------
#include <stdio.h>
int main()
{
int Count = 0; /* Count is created and set to 0 */
while (Count < 10) /* Checks to see if Count is less than 10 */
{ /* if it is then the program repeats */
printf("x");
Count++; /* this increases the value of Count by one
but 'Count--' would decrease the value by one
another thing is that if the '++' or '--' is
before the variable the variable is changed
before the program goes to the next line */
}
return 0;
}
-------------------------
for(;;;){...} loops
for.c
-------------------------
#include <stdio.h>
int main()
{
int Count; /* This time the Count variable is not given a
value */
for (Count = 0; Count < 10; Count++)
{ /* Count is set to 0; Count is tested; Count is incremented */
printf("x");
}
return 0;
}
-------------------------
That should be clear enough for you to learn from.
Loops aren't all that hard, but are extremely important! Never under estimate the power of a well written loop!
;) lol . o O ( Sorry, I always wanted to say that! )
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