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Display how binary to decimal

#include <stdio.h> #include <string.h> #include <stdlib.h> int main(void) { char *num = "11000110"; int tnum, i, result; tnum = i = result = 0; printf("%% %s\n", num); for(i = 1; *num; num++, i *= 2) { if(*num == '1') tnum = 1; else tnum = 0; result += tnum * i; printf(" %d * %3d = %2d\n", tnum, i, ((tnum * i) ? (tnum * i) : 0)); } printf(" +--+\n"); printf(" %2d\n", result); return 0; }