36 lines
802 B
C
Executable File
36 lines
802 B
C
Executable File
#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/file.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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int
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main(int argc, char *argv[])
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{
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int fdin = open(argv[1], O_RDONLY);
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if (fdin == -1) {
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return 1;
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}
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unsigned int res = 0, tmp;
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unsigned char num[4]; // не пишем в int, т.к. неизвестно, какой порядок байтов
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while (read(fdin, num, 4) == 4) {
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// unsigned int tmp = (unsigned int) num << 24 | (unsigned int) num <<
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// 16 |
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// (unsigned int) num << 8 | (unsigned int) num;
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for (int i = 0; i < 4; i++) {
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tmp = tmp << 8 | num[i];
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}
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res += tmp;
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}
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printf("%u\n", res);
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close(fdin);
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return 0;
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}
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