Question

Using C programming in UNIX, how would you do this?

• Create the following custom function given its prototype and description:
  • void increaseIntegerPointer(int *);
    • A call-by-reference function that will increase the value of the integer variable that this pointer points to. In other words, dereference the pointer and increase the integer value by 100.
    • integer in main is: int var1 = 20;

Answer 1

#include <stdio.h>

void increaseIntegerPointer(int *);

int main() {
    int var1 = 20;
    increaseIntegerPointer(&var1);
    printf("%d\n", var1);
    return 0;
}

void increaseIntegerPointer(int *p) {
    *p += 100;
}