Update Homework_2.c

Homework 2/Homework_2.c

@@ -171,13 +171,6 @@ void tracePrint(char arr1[15][20], int n){
 
 
 
-/*function input:
- * empty arrays of distances and names of traces,
- * values for distances, number of traces;
- * Since it is requred to know n traces and n distances 
- * the code reads the user input 2n times  
- */
-
  void filling_array(char arr[15][20],char arr1[15][20],float val[15],int n){
 	int i, y, j;
 	//use the variable to keep track of different elements inside arrays
@@ -198,12 +191,24 @@ void tracePrint(char arr1[15][20], int n){
 		else
 		{
 			printf("Write the distance #%d:\n", y + 1);
-			scanf("%s", arr1[y]);
-			val[y] = atof(arr1[y]);
-			//atof converts the string to a float 
-			y++;
-		}
-	}	
+			while(1)
+			{
+				scanf("%s",arr1[y]);
+				val[y]=atof(arr1[y]);
+				//atof converts the string to a float 	
+				if(val[y]>0)
+				{
+					y++;
+					break;
+				}
+				else
+				{
+					printf("Please write the valid expression for the length it should be positive\n");
+				}
+			}
+		}	
+	}
+
 }