Page 21 - Programming Microcontrollers in C

6 Chapter 1 Introduction to C

The result obtained when running this program is as follows.

a * b * c = 100
a * b + c = 52
a + b * c = 20

Here is another example that demonstrates a primitive looping
construct:

#include <stdio.h>
int main(void)
{
int i;

i=1;
printf(“\ti\ti\ti\n”);
printf(“\t\t Squared Cubed\n\n”);
while(i<11)
{
printf(“\t%d\t%d\t%d\n”, i, i*i, i*i*i);
i=i+1;
}
return 0;
}

This example was designed to produce a simple table of the val­
ues of the first ten integers, these values squared, and these values
cubed. The lines

printf(“\ti\ti\ti\n”);
printf(“\t\t Squared Cubed\n\n”);
combine to produce a header that identifies the contents of the three
columns generated by the program. The escape character \t is a tab
character that causes the screen cursor to skip to the next tab posi­
tion. The default tab value in C is eight spaces.
The command

while(i<11)
.....
causes the argument of the while to be evaluated immediately, and
if the argument is TRUE, the statement following the while will be