69 lines
933 B
C
69 lines
933 B
C
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#include<stdio.h>
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#include<stdlib.h>
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#include<stdbool.h>
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void purge_line_comments()
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{
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char c;
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do
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{
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c = getchar();
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if (EOF == c)
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{
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exit(EXIT_SUCCESS);
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}
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} while ( '\n' != c );
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}
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int hex(char c)
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{
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switch(c)
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{
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case '0' ... '9': return (c - 48);
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case 'a' ... 'f': return (c - 87);
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case 'A' ... 'F': return (c - 55);
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default: break;
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}
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printf("You managed to call a hex function without a hex value!!!\n");
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exit(EXIT_FAILURE);
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}
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int main(int argc, char *argv[])
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{
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char c;
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int sum;
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bool toggle;
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toggle = false;
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do
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{
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c = getchar();
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switch(c)
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{
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case '0' ... '9':
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case 'a' ... 'f':
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case 'A' ... 'F':
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{
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if(!toggle)
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{
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sum = hex(c);
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toggle = true;
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}
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else
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{
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sum = (sum * 16) + hex(c);
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toggle = false;
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putc(sum, stdout);
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}
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break;
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}
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case '#': purge_line_comments();
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default: break;
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}
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}while(c != EOF);
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exit(EXIT_SUCCESS);
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}
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