Create counting sort.c

algorithms/C/sorting/counting sort.c

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+// Counting sort is a stable Sorting Algorithm
+#include<stdio.h>
+ 
+void countSort(int a[],int n,int key)
+{
+     int count[50]={0};  // assigning all elements as zero
+     int i,j;
+    
+     for(i=0;i<n;++i)
+      count[a[i]]=count[a[i]]+1;  // increasing value of index(elements of array given) of count array
+
+     printf("Sorted elements after applying Counting sort:");
+    
+     for(i=0;i<=key;++i)
+      for(j=1;j<=count[i];++j)
+       printf("%d ",i);
+}
+ 
+int main()
+{
+    int a[40],n,i,key=0;
+    printf("Enter number of elements:");
+    scanf("%d",&n);
+    printf("\nEnter elements in array:");
+       // finding the masimum elements from the array 
+       // to declare it as size of count array
+    for(i=0;i<n;++i)
+    {
+     scanf("%d",&a[i]);
+     if(a[i]>key)
+      key=a[i];
+    }
+    // calling counting sort
+    countSort(a,n, key);
+    return 0;
+}