switch not assigning value problem

**ilikepython** · May 7 '07, 01:27 AM

Originally posted by huzzaa

I am trying to get the user to input 1-10 and that will select a a number from an array and place it into a variable. here is the code.

Code:

   
   do
    {
      cout << "Enter the first row from column 1 to be summed (1-10)";
      cout << endl << endl;
      cin >> answer1;
      
      switch(answer1)
      {
        case '1': a[0][0] = num1;
          break;
        case '2': a[1][0] = num1;
          break;
        case '3': a[2][0] = num1;
          break;
        case '4': a[3][0] = num1;
          break;
        case '5': a[4][0] = num1;
          break;
        case '6': a[5][0] = num1;
          break;
        case '7': a[6][0] = num1;
          break;
        case '8': a[7][0] = num1;
          break;
        case '9': a[8][0] = num1;
          break;
        case '10': a[9][0] = num1;
          break;
        default : cout << "Invalid input, please select a number 1-10"; 
                  cout << endl << endl;
      }//end switch for answer 1
      
      cout << "Enter the second row from column 1 to be summed (1-10)";
      cout << endl << endl;
      cin >> answer2;
      
      switch(answer2)
      {
        case '1': a[0][0] = num2;
          break;
        case '2': a[1][0] = num2;
          break;
        case '3': a[2][0] = num2;
          break;
        case '4': a[3][0] = num2;
          break;
        case '5': a[4][0] = num2;
          break;
        case '6': a[5][0] = num2;
          break;
        case '7': a[6][0] = num2;
          break;
        case '8': a[7][0] = num2;
          break;
        case '9': a[8][0] = num2;
          break;
        case '10': a[9][0] = num2;
          break;
        default : cout << "Invalid input, please select a number 1-10"; 
                  cout << endl << endl;
      }//end switch for answer 2
   
     num1 + num2 = total;
     total = a[j][1];

the problem is. when I try and add the two numbers (num1 + num2) it says there is a "non-lvalue in assignment".

are my switch statements incorect? can I not do that with an array?

all help is much Appreciated . Thanks in advance.

Not sure what you're trying to do. Do you mean "total = num1 + num2;"? Right after you say "total = a[j][1];". Do you mean "a[j][1] = total"? Could please clarify on what you are trying to do?

**svlsr2000** · May 7 '07, 02:52 AM

Originally posted by huzzaa

I am trying to get the user to input 1-10 and that will select a a number from an array and place it into a variable. here is the code.

Code:

 
 
 
 
num1 + num2 = total;
total = a[j][1];

the problem is. when I try and add the two numbers (num1 + num2) it says there is a "non-lvalue in assignment".

are my switch statements incorect? can I not do that with an array?

all help is much Appreciated . Thanks in advance.

num1 + num2 results in rvalue. You cannot assign anything to rvalue. :)
Are you looking for something like
total = num1 + num2;

switch not assigning value problem

switch not assigning value problem

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