Question

please rewrite or convert this C program into Assembly language and please make a notice of which function is which!

#include <stdio.h>
#include <stdlib.h>

void printMonthYear(int mon,int year);

void printDaysOfWeek();

void printDays(int mon,int year);

int getFirstDayOfMonth(int mon, int year);

int getNumOfDaysInMonth(int mon, int year);

int main(void) {
  
int mon=-1;
int year= -1;

printf("Month : ");
fflush(stdout);
scanf("%d",&mon);
  
if(mon < 1|| mon > 12){
printf("Invalid month >.<!: %d ! Must be between 1 and 12\n",mon);
return 1;
}

printf("Year : ");
fflush(stdout);
scanf("%d",&year);
  
if(year < 2000){
printf("Invalid year >.<!: %d! Must be 2000 or later!\n",year);
return 1;
}

printf("\n");
printMonthYear(mon,year);
printDaysOfWeek();
printDays(mon,year);
return EXIT_SUCCESS;

}

void printMonthYear(int mon, int year){
  
switch(mon){
case 1:{
  
printf("\tJanuary %d",year);
break;
}
  
case 2:{
  
printf("\tFebruary %d",year);
break;
}
  
case 3:{
  
printf("\tMarch %d",year);
break;
}
  
case 4:{
  
printf("\tApril %d",year);
break;
}
  
case 5:{
  
printf("\tMay %d",year);
break;
}
  
case 6:{
  
printf("\tJune %d",year);
break;
}
  
case 7:{
  
printf("\tJuly %d",year);
break;
}
  
case 8:{
  
printf("\tAugust %d",year);
break;
}
  
case 9:{
  
printf("\tSeptember %d",year);
break;
}
  
case 10:{
  
printf("\tOctober %d",year);
break;
}
  
case 11:{
  
printf("\tNovember %d",year);
break;
}
  
case 12:{
  
printf("\tDecember %d",year);
break;
}
  
default:{
  
printf("Invalid month >.<!: %d ! Must be between 1 and 12\n",mon);
break;
}

}

}

void printDaysOfWeek(){
  
printf("\n Su Mo Tu We Th Fr Sa\n");

}

int getFirstDayOfMonth(int mon, int year){
  
int day, century, result;
mon = ((mon + 9) % 12) + 1;
year = year-2000;
  
if(mon > 10){
year--;
}
  
day = 1;
century = 20;
result = day + year+(13 * mon - 1) / 5 + year / 4 + century / 4 - 2 * century;
result = result%7;
result = result + 7;
result = result%7;
return result;

}

int getNumOfDaysInMonth(int mon, int year){
if(mon == 1 || mon == 3 || mon == 5 || mon == 7 || mon == 8 || mon == 10 || mon ==12)
return 31;
  
else if(mon == 4 || mon == 6 || mon == 9 || mon == 11)
return 30;
  
else
return 28;

}

void printDays(int mon, int year){
  
int dayOfWeek = getFirstDayOfMonth(mon,year);
  
for(int i=0;i<dayOfWeek;i++)
printf(" ");
  
int daysInMonth = getNumOfDaysInMonth(mon,year);
  
for(int i=1;i<=daysInMonth;i++){

if(i > 9)
printf(" %d",i);

else
printf(" %d ",i);

if((i+dayOfWeek)%7 == 0)
printf("\n");
}

printf("\n");

}

Answer 1

Qo.

ANS:

Assembly Code is:

.global main
   .func main
   main:
       MOV r1, #1
       CMP r1, #0
       BEQ case_1
       C case_def
   case_1:
       LDR r0,=op_1
       C END
   case_2:
       LDR r0,=op_2
       C END
   case_3:
       LDR r0,=op_3
       C END
   case_4:
       LDR r0,=op_4
       C END
   case_5:
       LDR r0,=op_5
       C END
   case_6:
       LDR r0,=op_6
       C END
   case_7:
       LDR r0,=op_7
       C END
   case_8:
       LDR r0,=op_8
       C END
   case_9:
       LDR r0,=op_9
       C END
   case_10:
       LDR r0,=op_10
       C END
   case_11:
       LDR r0,=op_11
       C END
   case_12:
       LDR r0,=op_12
       C END
   case_def:
       LDR r0, =op_def
   END:
       BL puts
       MOV R7,
       SWI 0  
   .data
   op_1: .asciz "January"
   op_2: .asciz "February"
   op_3: .asciz "March"
   op_4: .asciz "April"
   op_5: .asciz "MAy"
   op_6: .asciz "June"
   op_7: .asciz "July"
   op_8: .asciz "August"
   op_9: .asciz "September"
   op_10: .asciz "October"
   op_11: .asciz "Novembber"
   op_12: .asciz "December"
   op_def: .asciz "Wrong year"  
   .global puts

------------------------------------------------------------------------------------------------------------------

THANKS!!