Computer Science 161

Professor Valente

An Example of C++ progamming

The Algorithm:

Set the value of Sum to 0

Get a value for X

While X is not 0

Set the value of Sum to Sum + X

Get a value for X

End While

Print the value of Sum

Stop

Our VSC-32 assembly language program to solve this problem:

LOAD Zero

STORE Sum

READ X

While: LOAD X

JUMP Print

LOAD Sum

ADD X

STORE Sum

READ X

LOAD Zero

JUMP While

Print: WRITE Sum

STOP

Zero: DATA 0

Sum: DATA 0

X: DATA 0

A C++ program to solve this problem:

main() {

int x, sum = 0;

while (x != 0)

{

sum += x;

cin >> x;

}

cout << “sum = ” << sum;

}