added polynomial representation and summation

algorithms/polynomialsum.c

@@ -0,0 +1,85 @@
+/*Representation of polynomial and summation of two polynomials*/
+#include <stdio.h>
+typedef struct 
+{
+    int exp;
+    float coeff;
+}terms;
+void inputPoly(terms a[],int n)
+{
+    printf("Please enter the input in descending order of degrees \n");
+    for(int i=0;i<n;i++)
+    {
+        printf("Enter the coefficient ");
+        scanf("%f",&a[i].coeff);
+        printf("Enter the exponent ");
+        scanf("%d",&a[i].exp);
+    }
+}
+displayPoly(terms a[],int n)
+{
+    printf("%fx^%d",a[0].coeff,a[0].exp);
+    for(int i=1;i<n;i++)
+    {
+        printf("+%fx^%d",a[i].coeff,a[i].exp);
+    }
+}
+int polyAdd(terms a[],terms b[],terms c[],int n1,int n2)
+{
+    int i=0,j=0,k=0;
+    while(i<=n1&&j<=n2)
+    {
+        if(a[i].exp==b[j].exp)
+        {
+            c[k].exp=a[i].exp;
+            c[k].coeff=a[i].coeff+b[j].coeff;
+            i++;j++;k++;
+        }
+        else if(a[i].exp>b[j].exp)
+        {
+            c[k].exp=a[i].exp;
+            c[k].coeff=a[i].coeff;
+            i++;k++;
+        }
+        else if(a[i].exp<b[j].exp)
+        {
+            c[k].exp=b[j].exp;
+            c[k].coeff=b[j].coeff;
+            j++;k++;
+        }
+    }
+    while(i<=n1)
+    {
+       c[k].exp=a[i].exp;
+        c[k].coeff=a[i].coeff;
+        i++;k++; 
+    }
+    while(j<=n2)
+    {
+      c[k].exp=b[j].exp;
+      c[k].coeff=b[j].coeff;
+      j++;k++;  
+    }
+    return k;
+}
+void main()
+{
+    terms a[10],b[10],r[20];
+    int n1,n2;
+    printf("Enter number of terms in first polynomial\n");
+    scanf("%d",&n1);
+    printf("Enter number of terms in second polynomial\n");
+    scanf("%d",&n2);
+    printf("Enter first polynomial\n");
+    inputPoly(a,n1);
+    printf("Enter second polynomial\n");
+    inputPoly(b,n2);
+    printf("first polynomial\n");
+    displayPoly(a,n1);
+    printf("\n");
+    printf("second polynomial\n");
+    displayPoly(b,n2);
+    int k=polyAdd(a,b,r,n1,n2);
+    printf("\n");
+    displayPoly(r,k-1);
+}