hey i got to write a program which stores randoms numbers in an array use insertion sort and selection sort and time both of them witht the lcock fnction to see which is faster.how do i use the clock function?? where do i put it?

Code:

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
void print(int[]);
int random(int,int);
void insertionsort(int[]);
void selectionSort(int[]);
int main(){
int i,arr1[10000],arr2[10000];
srand(time(0));
for(i=0;i<10000;i++){
arr1[i]=random(1,1000000);
arr2[i]=random(1,1000000);
}
insertionsort(arr1);
print(arr1);
selectionSort(arr2);
print(arr2);
system("pause");
return 0;
}
int random(int m,int n){
int offset =rand()/(RAND_MAX + 1.0)*(n-m+1);
return m+offset;
}
void insertionsort(int arr[]){
int j,k,key;
for(j=0;j<10000;j++){
key=arr[j];
k=j-1;
while(k>=0 && key<arr[k]){
arr[k+1]=arr[k];
--k;
}
arr[k+1]=key;
}
}
void selectionSort(int numbers[])
{
int array_size=10000;
int i, j;
int min, temp;
for (i = 0; i < array_size-1; i++)
{
min = i;
for (j = i+1; j < array_size; j++)
{
if (numbers[j] < numbers[min])
min = j;
}
temp = numbers[i];
numbers[i] = numbers[min];
numbers[min] = temp;
}
}
void print(int arr[]){
int j;
for(j=0;j<10000;j++){
printf("%d ",arr[j]);
}
}