Slight problem with my c++ program?

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100


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90





Enter number 1: 10


Enter number 2: 20


Enter number 3: -5


Enter number 4: 7


Enter number 5: 23





The sum is 55.





This is the samle output that I am supposed to reproduce with codes. I got.





#include %26lt;iostream.h%26gt;





int main () {


int counter, num, sum, numValues;





cout %26lt;%26lt; "Loop Examples 2" %26lt;%26lt; endl %26lt;%26lt; endl;





counter = 10;


do {


cout %26lt;%26lt; counter %26lt;%26lt; " ";


counter++;


} while (counter %26lt;= 20);





cout %26lt;%26lt; endl %26lt;%26lt; endl;





counter = 101;


do {


counter--;


cout %26lt;%26lt; counter %26lt;%26lt; endl;


} while (counter %26gt; 90);


cout %26lt;%26lt; endl;





numValues = 1;


do {





cout %26lt;%26lt; "Enter number" %26lt;%26lt; numValues %26lt;%26lt; ": " ;


cin %26gt;%26gt; num;


numValues++;


sum+= num;


} while (numValues %26gt; 0 %26amp;%26amp; numValues %26lt; 6);


cout %26lt;%26lt; endl;


cout %26lt;%26lt; "The Sum is: " %26lt;%26lt; sum %26lt;%26lt; endl;


return 0;





}


My problem is when i compile and run this program, the Sum does NOT come out right.

Slight problem with my c++ program?
You're problem is right here:





sum += num;





sum isn't initialized to 0. It's garbage when it starts out. That's why your output is wrong.





When you declare sum do this:





int sum = 0;
Reply:Where do you assign an initial value to sum? When you declare a value in C++, its initial value is whatever happens to be at that spot of memory at that time. You need to make sure to set sum=0; before the loop that uses it.





A side note:


Using for loops will make your program simpler and easier to read. Here is the code with the sum variable initialized to 0 and using for loops:





#include %26lt;iostream.h%26gt;





int main () {


int num, sum, numValues;





cout %26lt;%26lt; "Loop Examples 2" %26lt;%26lt; endl %26lt;%26lt; endl;





for (int counter = 10; counter %26lt;=20; counter++)


{


cout %26lt;%26lt; counter %26lt;%26lt; " ";


}


cout %26lt;%26lt; endl %26lt;%26lt; endl;





for (counter = 100; counter %26gt;= 90; counter--)


{


cout %26lt;%26lt; counter %26lt;%26lt; endl;


}


cout %26lt;%26lt; endl;





sum = 0;


for (numValues = 1; numValues %26lt; 6; numValues++)


{


cout %26lt;%26lt; "Enter number" %26lt;%26lt; numValues %26lt;%26lt; ": " ;


cin %26gt;%26gt; num;


sum+=num;


}


cout %26lt;%26lt; endl;


cout %26lt;%26lt; "The Sum is: " %26lt;%26lt; sum %26lt;%26lt; endl;





return 0;


}
Reply:use sum += num; to correct your problem.








Dornessa


http://onlinedownlinebuilders.com