Translate C code into Pep/9 Assembly Language: #stack-based calculator

#include  #include  #include  

#define STACKSIZE 6 

int stack[STACKSIZE]; int stackpointer; 

void push(int N) { 

 if (stackpointer == STACKSIZE-1) printf("Error: stack overflow "); 

 else { stackpointer++;stack[stackpointer] = N;} 

}

void poptop() { 

 if (stackpointer<0) printf("Error: stack empty "); else stackpointer--; 

}

void printtop() { 

 if (stackpointer>-1) printf("%d ",stack[stackpointer]); else printf("Error: stack empty "); 

}

void clearstack() { 

 stackpointer=-1; } 

void showstack() { 

 int i=stackpointer; 

 while (i>=0) { printf("%d ",stack[i]); i--;} } 

void add() {

if (stackpointer<1) printf("Error: not enough operands for operation "); else

{ stack[stackpointer-1]=stack[stackpointer-1]+stack[stackpointer]; stackpointer--;

} }

void subtract() { 

if (stackpointer<1) printf("Error: not enough operands for operation "); else

{ stack[stackpointer-1]=stack[stackpointer-1]-stack[stackpointer]; stackpointer--;

} }

void multiply() { 

if (stackpointer<1) printf("Error: not enough operands for operation "); else

{ stack[stackpointer-1]=stack[stackpointer-1]*stack[stackpointer]; stackpointer--;

} }

void divide() { 

if (stackpointer<1) printf("Error: not enough operands for operation "); else if (stack[stackpointer] == 0) printf("Error: attempt to divide by 0 "); else {

}

stack[stackpointer-1]=stack[stackpointer-1]/stack[stackpointer];

 stackpointer--; } 

int power (int a, int b) { 

 // returns a to the power b int result=a, i; for (i=b; i>1; i--) result*=a; return result; 

}

void exponentiate() { 

if (stackpointer<1) printf("Error: not enough operands for operation "); else if (stack[stackpointer] < 0) printf("Error: negative exponent power "); else {

}

stack[stackpointer-1]=power(stack[stackpointer-1],stack[stackpointer]);

 stackpointer--; } 

int main() {

 char linein[20]; int go_on=1, number; 

 stackpointer = -1; 

 while (go_on) { 

 printf(": "); scanf("%s",linein); number=atoi(linein); 

 if (number!=0) push(number); else 

 { if (linein[0]=='q') go_on=0; else if (linein[0]=='=') printtop(); else if (linein[0]=='p') poptop(); else if (linein[0]=='c') clearstack(); else if (linein[0]=='d') showstack(); else if (linein[0]=='+') add(); else if (linein[0]=='-') subtract(); else if (linein[0]=='*') multiply(); else if (linein[0]=='/') divide(); else if (linein[0]=='^') exponentiate(); else printf("Error: unrecognized command "); 

} }

 printf("Goodbye "); 

return 0; }