Compilare: main.cpp: In function 'int main()': main.cpp:25:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i < B.size()) { ~~^~~~~~~~~~ main.cpp:30:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = pow2 - 1; j >= 0 && i < B.size(); --j) { ~~^~~~~~~~~~ main.cpp:31:22: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if ((x & (1 << j) > 0 && (B[i] - '0') == 1) || ((x & (1 << j)) == 0 && B[i] - '0' == 0)) { ~~~~~~~~~^~~ main.cpp:42:17: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result] system("PAUSE"); ^