int bandera;
while (++bandera != 1) {
bandera--;
}
I do not understand the code of ++bandera != 1 . Does it mean that +1 is added to the flag and then fixed if it is different from 1?
int bandera;
while (++bandera != 1) {
bandera--;
}
I do not understand the code of ++bandera != 1 . Does it mean that +1 is added to the flag and then fixed if it is different from 1?
Exactly. The pre-increment operator, which is what it is called, first modifies the variable and then leaves it available for the expression in which it is used. The post-increment on the contrary first uses the value and then increases the variable. In both cases, the value of the variable is increased. Something similar happens with the pre- and post-decrement ones.
One way to see it working would be:
int a = 0, b = 0;
printf(“pre: %d, post: %d\n”, ++a, b++);
printf(“a: %d, b: %d\n”, a, b);
The result is:
pre: 1, post: 0
a: 1, b: 1