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#include <cstdio> int main() { FILE *f = fopen("test.bin", "wb"); unsigned char d[1024] = { 0 }; fwrite(d, 1, 1024, f); fclose(f); f = fopen("test.bin", "rb+"); for (size_t i = 0; i < 1024; i++) { unsigned char a[1] = { 255 - (unsigned char)(i) }; fwrite(a, 1, 1, f); fseek(f, i, SEEK_SET); fread(a, 1, 1, f); printf("%02X ", a[0]); } fclose(f); return 0; }
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