Script started on Wed Oct  7 17:29:30 2026
macbook:Desktop> cat q11.c
#include <stdio.h>

int main() {
    int i, *p;
    p = &i;
    i = 5;
    *p = 8; 
    printf("i has the value %d\n", i);
    // What value will it print?

    return 0;
}
macbook:Desktop> gcc q11.c -o q11
macbook:Desktop> ./q11 
i has the value 8
macbook:Desktop> cp q11.c avg_sum.c
macbook:Desktop> vi avg_sum.c 
macbook:Desktop> gcc avg_sum.c 
avg_sum.c:6:9: error: assigning to 'float *' from incompatible type 'double'
    6 |     sum = 0.0; // *sum = 0.0
      |         ^ ~~~
avg_sum.c:8:13: error: invalid operands to binary expression ('float *' and 'float')
    8 |         sum += a[i]; // *sum = *sum + a[i]
      |         ~~~ ^  ~~~~
avg_sum.c:9:15: error: invalid operands to binary expression ('float *' and 'int')
    9 |     avg = sum / n; // *avg= *sum / n
      |           ~~~ ^ ~
3 errors generated.
macbook:Desktop> vi avg_sum.c 
macbook:Desktop> cat avg_sum_v2.c 
#include <stdio.h>

void avg_sum (float a[], int n, float *avg, float *sum)
{
    int i;
    *sum = 0.0; // *sum = 0.0
    for (i=0;i<n;i++)
        *sum += a[i]; // *sum = *sum + a[i]
    *avg = *sum / n; // *avg= *sum / n
}

int main() {
    float a[] = {3.0, 4.5, 6.7};

    float avg, sum;
    int a_size = sizeof(a);

    avg_sum(a, a_size, &avg, &sum);

    printf(" %f is avg, %f is sum\n", avg, sum);
    return 0;
}
macbook:Desktop> gcc avg_sum_v2.c
macbook:Desktop> ./a.out
 9565954342467123143910621184.000000 is avg, 114791454470788719161750061056.000000 is sum
macbook:Desktop> vi ex12a.c      
macbook:Desktop> gcc ex12a.c[[>1;95;0c2004l
macbook:Desktop> ./a.out
a[0] is 10
a[1] is 9
a[2] is 8
a[3] is 7
a[4] is 6
a[5] is 5
a[6] is 4
a[7] is 3
a[8] is 2
a[9] is 1
macbook:Desktop> exit

Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.
Deleting expired sessions...none found.

Script done on Wed Oct  7 18:46:06 2026