chore(C): added counting sort algorithm

algorithms/C/sorting/counting-sort.c

@@ -0,0 +1,33 @@
+#include<stdio.h>
+ 
+void counting_sort(int a[],int n,int max)
+{
+     int count[50]={0},i,j;
+    
+     for(i=0;i<n;++i)
+      count[a[i]]=count[a[i]]+1;
+      
+     printf("\nSorted elements are: ");
+    
+     for(i=0;i<=max;++i)
+      for(j=1;j<=count[i];++j)
+       printf("%d ",i);
+}
+ 
+int main()
+{
+    int a[50],n,i,max=0;
+    printf("Enter number of elements: ");
+    scanf("%d",&n);
+    printf("\nEnter elements: ");
+                  
+    for(i=0;i<n;++i)
+    {
+     scanf("%d",&a[i]);
+     if(a[i]>max)
+      max=a[i];
+    }
+    
+    counting_sort(a,n,max);
+    return 0;
+}