commments for 6 and 7. 9 works, 8 does not

Assignment 7/main.c

@@ -9,23 +9,23 @@
 #include<math.h>
 
 int main(){
-    int m,n,i,j,c;
-    double price[100] = {0};
-    int matrix[100][100];
-    scanf("%d",&n);
-    for(i = 0; i<n; i++){
-        scanf("%lf", &price[i]);
-        }
-    scanf("%d",&m);
-    for(j = 0; j<m; j++){
-        for (c = 0; c < n; c++){
-        scanf("%d",&matrix[c][j]);
+    int m,n,i,j,c;  /*Declare Variables*/
+    double price[100];    /*Declare array price*/
+    int matrix[100][100];   /*Declare array matrix*/ 
+    scanf("%d",&n);     /*Get amount of items*/
+    for(i = 0; i<n; i++){   /*Loop to get price for every item and store them into array price*/
+        scanf("%lf", &price[i]); 
+    }
+    scanf("%d",&m);     /*Get amount of customers*/
+    for(j = 0; j<m; j++){   /*Loop the following code for every custromer*/
+        for (c = 0; c < n; c++){ /*Loop to get amount of every item and store amount of customers and amount of items they buy in matrix*/
+            scanf("%d",&matrix[c][j]);
         } 
     }
-    for (j = 0; j<m; j++){
+    for (j = 0; j<m; j++){  /*Loop the following code for every custromer*/
         float total = 0;
-        for(c = 0; c < n; c++){
-        total += matrix[c][j]*price[c];
+        for(c = 0; c < n; c++){     /*Calculating total*/
+            total += matrix[c][j]*price[c];
         }
         printf("%.2f\n", total);
     }