kdeng00
109 lines
2.3 KiB
C
109 lines
2.3 KiB
C
/*
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*
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* Exercise 3-5. Write a function itob(n,s,b) that converts the integer
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* m into a base b character representation in the string s. In
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* particular, itob(n,s,16) formats s as a hexadecimal integer in s.
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*
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*
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* Author: Kun Deng
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "hex.h"
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// Only bases of 8 and 16 are supported. So Hexidecimal or octal
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// Returns -1 if invalid. and 1 if valid
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int itob(int n, char *s, int b);
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void test();
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int main()
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{
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// test();
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const int number = 128;
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const int base_value = 8;
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char value[1024];
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int result = itob(number, value, base_value);
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if (result == -1)
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{
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printf("Base %d is not supported\n", base_value);
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return -1;
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}
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if (base_value == 8)
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{
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printf("%d is in octal (%d base) %s\n", number, base_value, value);
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}
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else if (base_value == 16)
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{
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printf("%d is in hexidecimal (%d base) %s\n", number, base_value, value);
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}
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return 0;
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}
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int itob(int n, char *s, int b)
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{
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int result = 0;
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if (! (b == 8 || b == 16))
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{
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// Neither 8 or 16 based. Invalid
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result = -1;
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return result;
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}
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const int ARRAY_SIZE = 1024;
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char number_value[ARRAY_SIZE];
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HexOctalConv_itoa(n, number_value, 10);
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// printf("Number %d is %s in string\n", n, number_value);
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if (b == 8)
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{
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HexOctalConv_number_converted_to_octal(s, number_value);
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}
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else if (b == 16)
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{
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HexOctalConv_number_converted_to_hex(s, number_value);
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}
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return result;
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}
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void test()
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{
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char *number = "21";
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char hex_number[1024];
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HexOctalConv_number_converted_to_hex(hex_number, number);
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printf("%s converted to hex is %s\n", number, hex_number);
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number = "55";
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HexOctalConv_number_converted_to_hex(hex_number, number);
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printf("%s converted to hex is %s\n", number, hex_number);
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const int numerical_value = HexOctalConv_hex_converted_to_number(hex_number);
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printf("Hexidecimal %s is %d\n", hex_number, numerical_value);
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char octal_number[1024];
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HexOctalConv_number_converted_to_octal(octal_number, number);
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printf("%s converted to octal is %s\n", number, octal_number);
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const int o_numberical_value = HexOctalConv_octal_converted_to_number(octal_number);
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printf("Octal %s converted to a numerical value is %d\n", octal_number, o_numberical_value);
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}
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