title: for/while loop memory clearing in C
body: <p>In my program I'm messing around with, it simply asks for how many tests one has written and then returns an average. However I've modified it a bit so that it asks if the marks entered are correct.</p>
  
  <p>Problem 1: It doesn't let you input your marks for all your tests<br>
  Problem 2: If the marks are wrong it starts over but keep the previous inputs in it's memory? How do I fix the?</p>
  
  <p>Here's the code:</p>
  
  <pre><code>#include &lt;stdio.h&gt;
  #include &lt;stdlib.h&gt;
  
  int main(int argc, char *argv[]) {
  
      //int variables for grade
      unsigned int counter; //number of grades to be entered next
      int grade;
      int total;
      float average;
      // user input
      int userInput; // amount of tests
      int yesNo; 
      //amount of test passed
      unsigned int pass = 0;
      unsigned int fail = 0;
      int doCount = 1;
      //unsigned int test;
  
  //---------------------------------------------------------------------------------------------------// 
  
      //standards for program to abide to
      total = 0; //Total amount of test to be set to zero, until while statement
      counter = 1; //Loop counter to start from one
  
  //---------------------------------------------------------------------------------------------------// 
  
      printf ("Please enter amount of test you've written so far: ");
      scanf ("%d", &amp;userInput);
      //printf ("%d", userInput);
  
  //---------------------------------------------------------------------------------------------------//
  
      do {
          //Body of calculations of program
          for(counter = 0; counter &lt;= userInput; ++counter) { //for loop that correlates to userInput for amount of passes and test marks
              printf ("Please enter percentage mark: "); //prompt for test mark
              scanf("%d", &amp;grade);
              total = total + grade;
              counter = counter + 1;
              if (grade &gt;= 40) {  //if statement for pass or fail
                 pass = pass + 1;
              } else {
                   fail = fail + 1;
                  }
          }//end of for loop
          printf ("Are the grades entered correct? (1 = yes, 2 = no): "); // user input for yesNo - are inputs correct    
          scanf ("%d", &amp;yesNo);
          if (yesNo == 2) {
  
           } else {
              average = ((float)total / userInput); //Getting average for tests so far
                  //if statement to clarify if you're passing
              if (average &lt; 40) {
                  printf ("\nYou are below sub minimum!\n");
                  printf ("Your overall average is: %.2f %\n", average);
                  printf ("Passed: %d\n", pass);
                  printf ("Failed: %d", fail);
              } else if (average &gt;= 75){
                  printf ("\nYou have a distinction agregate!\n");
                  printf ("Your overall average is: %.2f %\n", average);
                  printf ("Passed: %d\n", pass);
                  printf ("Failed: %d", fail);
              } else {
                  printf ("\nYour overall average is: %.2f %\n", average);
                  printf ("Passed: %d\n", pass);
                  printf ("Failed: %d", fail);
              }
          doCount = 2;    
          }
      } while (doCount == 1);
  
      average = ((float)total / userInput); //Getting average for tests so far
  //---------------------------------------------------------------------------------------------------//     
  
      getch ();
      return 0;
  }
  </code></pre>