Thread: Stupid question, repeating a loop iteration?

Hey all, so I am working on a very simple program and it's almost to where I want it but I cannot figure out for life of me how to get this iteration to repeat when the user does not enter the value required


here is the portion of the code:

Code:

         for (x = 1; x <= numb_of_grades; x = x + 1)          
          {   /*  begin 'for X' loop.  */
              printf ("Enter grade #%i:", x);
              scanf ("%i", &grade);
              
              
              if ( grade < 0 || grade > 100)
                   printf ("*** Invalid entry. Grade must be 0 to 100. ***"); 
                
               
              else if ( grade >= 0 || grade <=100 )             
                      gradeTotal = gradeTotal + grade;
                    while ( (c = getchar() != '\n') && c != EOF);
              
           
           
                 
              
          }  /*  end 'for X' loop.  */

So all I want is the "invalid entry" to keep the user from going past the iteration he is on. So if he enters 4 grades I want it to do this:

Grade #1: 100
Grade #2: -30
*** Invalid entry. Grade must be 0 to 100. ***\
Grade #2: 30
Grade #3: 100
Grade #4: 100

Right now it just continues on through the loop.

Code:

int x, numb_of_grades, grade, gradeTotal = 0;	float finalavg = 0;
	char c; 
    	
    
    /*  Display initial greeting */
	/*  ------------------------ */
	
	printf ("This program calculates the average of as many grades you wish to enter.\n\n"); 


    
    numb_of_grades = 0;
    do{
    	
    		printf ("First, enter the number of grades to process:"); 
            scanf ("%i", &numb_of_grades);
            while ( (c = getchar() != '\n') && c != EOF); 
            
   	   	    if ( numb_of_grades < 2 );
    	        printf ("You must enter at least 2! \n\n");
    	 
    }while ( numb_of_grades < 2);
    
              printf ("Enter grade #%i:", x);
              scanf ("%i", &grade);
    
     return 0;

How would you make so it doesnt say the input is inadequate if it isnt?

Check line 19. That's why some choose to use curly brackets everywhere a block can be made, even if it's empty or just for one instruction. It helps alleviating such mistakes.

Also, line 16 - %i and %d aren't the same. Check scanf, fscanf, sscanf, scanf_s, fscanf_s, sscanf_s - cppreference.com