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#include <iostream> //1-ый вариант unsigned int bin_to_dec1(const char* b){ unsigned int i, d, k = 0, n = 0; const char* p; for(p = b; *p; ++p) ; if(p > b) --p; while(p >= b){ for(d = 1, i = 0; i < k; ++i) d *= 2; n += (unsigned int)((*p--) - '0') * d; ++k; } return n; } //2-ой вариант unsigned int bin_to_dec2(const char* b){ unsigned int n = 0; while(*b) n = (n << 1) | (unsigned int)((*b++) - '0'); return n; } int main(void){ std::cout << bin_to_dec1("1011100011101") << std::endl; std::cout << bin_to_dec2("1000110111011") << std::endl; return 0; }
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