C- Programs for LAB
Week 21
1
/* Write C program that implement the following sorting methods
to sort a given list of integers in ascending order: i) Insertion sort */
#include
#include
void inst_sort(int []);
void main()
{
int num[5],count;
clrscr();
printf(“\nEnter the Five Elements to sort:\n”);
for (count=0;count<5;count++)
scanf("%d",&num[count]);
inst_sort(num);
printf("\n\nElements after sorting: \n");
for(count=0;count<5;count++)
printf("%d\n",num[count]);
getch();
}
// Function for Insertion Sorting
void inst_sort(int num[])
{
int i,j,k;
for(j=1;j<5;j++)
{
k=num[j];
for(i=j-1;i>=0 && k
num[i+1]=k;
}
}
2
/* Write C program that implement the following sorting methods to sort a given list of integers in ascending order:
ii) Merge sort */
#include
#include
#define MAX_ARY 10
void merge_sort(int x[], int end, int start);
int main(void) {
int ary[MAX_ARY];
int j = 0;
printf(“\n\nEnter the elements to be sorted: \n”);
for(j=0;j
/* array before mergesort */
printf("Before :");
for(j = 0; j < MAX_ARY; j++)
printf(" %d", ary[j]);
printf("\n");
merge_sort(ary, 0, MAX_ARY - 1);
/* array after mergesort */
printf("After Merge Sort :");
for(j = 0; j < MAX_ARY; j++)
printf(" %d", ary[j]);
printf("\n");
getch();
}
/* Method to implement Merge Sort*/
void merge_sort(int x[], int end, int start) {
int j = 0;
const int size = start - end + 1;
int mid = 0;
int mrg1 = 0;
int mrg2 = 0;
int executing[MAX_ARY];
if(end == start)
return;
mid = (end + start) / 2;
merge_sort(x, end, mid);
merge_sort(x, mid + 1, start);
for(j = 0; j < size; j++)
executing[j] = x[end + j];
mrg1 = 0;
mrg2 = mid - end + 1;
for(j = 0; j < size; j++) {
if(mrg2 <= start - end)
if(mrg1 <= mid - end)
if(executing[mrg1] > executing[mrg2])
x[j + end] = executing[mrg2++];
else
x[j + end] = executing[mrg1++];
else
x[j + end] = executing[mrg2++];
else
x[j + end] = executing[mrg1++];
}
}
