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  1. section .data
  2.     text db 'Hello world, this is a sample text', 0
  3.     space db ' '
  4.     newline db 10
  5.  
  6. section .text
  7.     global _start
  8.  
  9. _start:
  10.     ; Set up counters
  11.     xor ecx, ecx  ; ecx will store the word count
  12.     xor edx, edx  ; edx will be the index for text traversal
  13.  
  14. count_words:
  15.     mov al, byte [text + edx]  ; load a byte from text into al
  16.     cmp al, 0  ; check if end of text
  17.     je print_count  ; if end of text, print word count
  18.  
  19.     cmp al, byte [space]  ; check if space
  20.     jne continue_count  ; if not space, continue counting
  21.  
  22.     inc ecx  ; increase word count
  23.  
  24. continue_count:
  25.     inc edx  ; increment text index
  26.     jmp count_words
  27.  
  28. print_count:
  29.     ; Convert word count to ASCII digits
  30.     xor ebx, ebx  ; ebx will store the divisor
  31.     mov eax, ecx  ; move word count to eax
  32.     mov ebx, 10  ; set ebx to 10 for division
  33.     xor edx, edx  ; clear edx for division
  34.     div ebx  ; divide eax by ebx, quotient in eax, remainder in edx
  35.     add edx, '0'  ; convert remainder to ASCII digit
  36.  
  37.     ; Print word count digit
  38.     mov eax, 4  ; system call number for write
  39.     mov ebx, 1  ; file descriptor for stdout
  40.     mov ecx, edx  ; value to print
  41.     mov edx, 1  ; number of bytes to write
  42.     int 0x80  ; make the system call
  43.  
  44.     ; Print newline character
  45.     mov eax, 4  ; system call number for write
  46.     mov ebx, 1  ; file descriptor for stdout
  47.     mov ecx, newline  ; newline character to print
  48.     mov edx, 1  ; number of bytes to write
  49.     int 0x80  ; make the system call
  50.  
  51.     ; Exit program
  52.     mov eax, 1  ; system call number for exit
  53.     xor ebx, ebx  ; exit status 0
  54.     int 0x80  ; make the system call
  55.  
Success #stdin #stdout 0s 5460KB
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language:

						
Assembler 32bit (nasm 2.14)

					

					

						
created:
								
						
332 days ago

					

					

						
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