Functions for Numbers
read_int
Description
Reads an integer from the keyboard. Input ends when the Enter key (Carriage Return) is pressed. The entered characters must be digits from '0' to '9'. The final number is stored in the specified variable.
Arguments
| Parametrs | Description |
|---|---|
| %1 | Address of the variable where the entered integer will be stored. |
Usage Example
section .data
user_input dw 0
section .text
read_int user_input
str_to_int
Description
Converts a string representing an integer into an int value. The string must end with $ and contain only digits from '0' to '9'.
Arguments
| Parametrs | Description |
|---|---|
| %1 | Address of the string to be converted. |
| %2 | Address of the variable where the integer will be stored. |
Usage Example
section .data
num_str db "123$", 0
result dw 0
section .text
str_to_int num_str, result
int_to_str
Description
Converts an integer into an ASCII string. The number can be passed in one of the registers (AX, BX, DX) or as a memory address. The result is stored in string format in the specified buffer, with the string ending in $.
Arguments
| Parameter | Description |
|---|---|
| %1 | Address of the buffer where the string representing the number will be stored. |
| %2 | Register or memory address containing the integer to be converted. Allowed values: AX, BX, DX, or a memory address. |
Usage Example
section .data
buffer db 10, 0 ; String buffer, must be large enough
number dw 1234 ; Number to be converted
section .text
int_to_str buffer, number
int_to_bin
Description
Converts an integer (up to 5 digits) into a binary string. The result is stored in string format in the specified buffer. Each bit of the number is represented by the character '0' or '1'. The string is terminated by the null character $.
Arguments
| Parameter | Description |
|---|---|
| %1 | Address of the integer to be converted to binary format. |
| %2 | Address of the buffer where the result (binary string) will be written. |
Example usage
section .data
number dw 12345 ; Example number for conversion
bin_result db 17, 0 ; Buffer to store the binary string (16 bits + 1 for null character $)
section .text
int_to_bin number, bin_result