Question

Could you please provide a detailed step by step explanation as to how I should go about obtaining the output shown for each program fragment.

Thanks.

a)

int f1 (int x) {

int y=3;

printf("%d%d",x,y);

return x++;

}

int main (void) {

int y=6, x=4;

printf("%d\n",f1(y));

printf("%d%d\n",x,y);

return 0;

}

OUTPUT:

x=6, y=36

x=4, y=6

b)

void f2(int n, int a[]) {

for (int i=0;i<n;i++)

a[i] += a[i+1];

}

int main() {

int A[]={1,2,3,3,4,5};int i, N=6;

for (i=0;i<N;i++)

printf("%d ",A[i]);

printf("\n");

f2(N-1,A);

for (i=0;i<N;i++)

printf("%d ",A[i]);

return 0;

}

OUTPUT:

A[i] = {1 2 3 3 4 5 }

A[i] = {3 5 6 7 9 5 }

c)

int f3 (int a, int b) {

printf("%d-%d\n", a,b);

if (b==1)

return a;

else

return a * f3(a,b-1);

}

int main (void) {

int y=6, x=2;

printf("%d\n",f3(x,y));

return 0;

}

OUTPUT:

a-b = 2-6

2-5

2-4

2-3

2-2

2-1

f3(x,y) = 64

Answer 1