55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
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#include <stdio.h>
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#include <string.h>
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int main(int argc, char **argv)
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{
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int i, len = strlen(argv[2]);
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if (argc>2)
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{
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if (argv[1][0]=='d')
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for(i = 0; i < len; i++)
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switch(i % 12)
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{
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case 0:
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case 1:
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case 2:
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case 4:
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case 5:
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case 6:
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case 8:
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case 9:
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putchar(argv[2][i]);
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break;
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default:
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break;
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}
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else
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for(i = 0; i < len; i++)
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switch(i % 8)
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{
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case 0:
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case 1:
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case 3:
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case 4:
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case 6:
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putchar(argv[2][i]);
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break;
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case 2:
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case 5:
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putchar(argv[2][i]);
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if(argv[2][i] == '0') putchar('1');
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else putchar('0');
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break;
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case 7:
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putchar(argv[2][i]);
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if(i < len - 1)
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printf("01");
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}
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}
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else printf("Usage: %s <d/e> <bit sequence>\n\td - decode\n\te - encode\n\tbit sequence as string of 0 and 1.\n", argv[0]);
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return 0;
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}
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