Question

C language

3. (10 pts) Write a function readSegment that takes three parameters, a float array as a pointer p as the first parameter, and two int indices startldx and endldx. The function readSegment reads the content of the array between startIdx and endldx, without using additional local variables. 4. (10 pts) Write a function called doubleOdds that takes two parameters, an array of double pointed to by pointer p and endldx of int type. The function doubleOdds doubles (multiply by 2.0) every other value in the array (values at 1,3,5, ...).

Answer 1

Answer 3 :

void readSegment(int *p, int startIdx , int endIdx){ // Declaration of function

while(startIdx != endIdx){ // Starting of while loop from start index to end

printf("%f ", *(p+startIdx)); // *(p+startIdx) gives the value at starting index as *p points to first index of float array

startIdx++; // increase the start index till it reaches end index

}

return;

}

Answer 4 :

void doubleOdds(int *p, int endIdx){ // Declaration of function

int i ; // Declaration of local variable i

for(i = 0; i < endIdx ; i++){ // Starting loop from first index to end index

*(p+i) = *(p+i) * 2.0;   // (p+i) gives the address and *(p+i) gives the value at that index

}

return;

}