Answer
Assuming that variables $a, b, c,$ and $d$ are stored in memory locations $100,$
$101,102,$ and $103,$ respectively:
$\begin{array}{llll}
{\text {Memory}} & {\text {} } & {\text {Address} } & {\text {} }\\
{\text {Location }} & {\text {Op Code} } & {\text {Field} } & {\text { Comment} }\\
{50} & {\text { LOAD }} & {103} & {\text { R contains the value } d} \\
{51} & {\text { STORE }} & {100} & {\text { And store it into } a} \\
{52} & {\text { COMPARE }} & {100,102} & {\text { Compare } a \text { and } c, \text { set condition codes }} \\
{53} & {\text { JUMPGT }} & {58} & {\text { Jump to address } 58 \text { if } a>c} \\ {54} & {\text { LOAD }} & {100} & {\text { R now contains the (current) value of a}}\\
{55} & {\text { ADD }} & {101} & {\text { R now contains the value } a+b} \\ {56} & {\text { STORE }} & {100} & {\text { And store that sum into } a} \\
{57} & {\text { JUMP }} & {52} & {\text { Jump back to test loop condition again}}\\
{58} & {\text { }} & { } & {\text { The next instruction begins here} }\\
\end{array}$
Work Step by Step
Assuming that variables $a, b, c,$ and $d$ are stored in memory locations $100,$
$101,102,$ and $103,$ respectively:
$\begin{array}{llll}
{\text {Memory}} & {\text {} } & {\text {Address} } & {\text {} }\\
{\text {Location }} & {\text {Op Code} } & {\text {Field} } & {\text { Comment} }\\
{50} & {\text { LOAD }} & {103} & {\text { R contains the value } d} \\
{51} & {\text { STORE }} & {100} & {\text { And store it into } a} \\
{52} & {\text { COMPARE }} & {100,102} & {\text { Compare } a \text { and } c, \text { set condition codes }} \\
{53} & {\text { JUMPGT }} & {58} & {\text { Jump to address } 58 \text { if } a>c} \\ {54} & {\text { LOAD }} & {100} & {\text { R now contains the (current) value of a}}\\
{55} & {\text { ADD }} & {101} & {\text { R now contains the value } a+b} \\ {56} & {\text { STORE }} & {100} & {\text { And store that sum into } a} \\
{57} & {\text { JUMP }} & {52} & {\text { Jump back to test loop condition again}}\\
{58} & {\text { }} & { } & {\text { The next instruction begins here} }\\
\end{array}$
