Please help me make memory diagrams for points one, two and three in the program. I dont know how to do so and I need to understand, also please explain what youre doing as youre solving /* An exercise to help you understand the use of pointer variables. */ #include int main(void) { int foo; int bar; int *fred; int *sam; bar = 100; foo = 200; fred = &foo; /* point one */ printf("point one: foo is %d and bar is %d.\n", foo, bar); sam = &bar; *sam += 30; *fred -= 40; /* point two */ printf("point two: foo is %d and bar is %d.\n", foo, bar); fred = &bar; *fred += 5; /* point three */ printf("point three: foo is %d and bar is %d.\n", foo, bar); printf("point three: *fred is %d and *sam is %d.\n", *fred, *sam); sam = &foo; *sam = *fred; /* point four */ printf("point four: foo is %d and bar is %d.\n", foo, bar); *sam *= 100; sam = fred; /* point five */ printf("point five: foo is %d and bar is %d.\n", foo, bar); printf("point five: *fred is %d and *sam is %d.\n", *fred, *sam); return 0; }
Please help me make memory diagrams for points one, two and three in the
/* An exercise to help you understand the use of pointer variables.
*/
#include <stdio.h>
int main(void)
{
int foo;
int bar;
int *fred;
int *sam;
bar = 100;
foo = 200;
fred = &foo;
/* point one */
printf("point one: foo is %d and bar is %d.\n", foo, bar);
sam = &bar;
*sam += 30;
*fred -= 40;
/* point two */
printf("point two: foo is %d and bar is %d.\n", foo, bar);
fred = &bar;
*fred += 5;
/* point three */
printf("point three: foo is %d and bar is %d.\n", foo, bar);
printf("point three: *fred is %d and *sam is %d.\n", *fred, *sam);
sam = &foo;
*sam = *fred;
/* point four */
printf("point four: foo is %d and bar is %d.\n", foo, bar);
*sam *= 100;
sam = fred;
/* point five */
printf("point five: foo is %d and bar is %d.\n", foo, bar);
printf("point five: *fred is %d and *sam is %d.\n", *fred, *sam);
return 0;
}
Step by step
Solved in 3 steps
