CF Comparing Two Long Integers 616A

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字符串问题，逐个比较，分情况讨论。

#include <iostream>#include <string>#define prin(x) std::cout << x << std::endlint main(){std::ios::sync_with_stdio(false);std::string a, b, longer, shorter;std::cin >> a >> b;bool falg = true;std::string::size_type lenth_a = a.size();std::string::size_type lenth_b = b.size();if (lenth_b > lenth_a){int interval = lenth_b - lenth_a;for (std::string::size_type i = 0; i != lenth_b - lenth_a; ++i){if (b[i] > '0'){//flag = false;std::cout << "<\n";return 0;}}for (std::string::size_type i = lenth_b - lenth_a; i != lenth_b; ++i){if (a[i - interval] == b[i])continue;else if (a[i - interval] > b[i]){std::cout << ">\n";return 0;}else{std::cout << "<\n";return 0;}}std::cout << "=\n";return 0;}else if (lenth_b == lenth_a){for (std::string::size_type i = 0; i != lenth_b; ++i){if (a[i] == b[i])continue;else if (a[i] > b[i]){std::cout << ">\n";return 0;}else{std::cout << "<\n";return 0;}}std::cout << "=\n";return 0;}else{int interval = lenth_a - lenth_b;for (std::string::size_type i = 0; i != lenth_a - lenth_b; ++i){if (a[i] > '0'){//prin(a[i]);//flag = false;std::cout << ">\n";return 0;}}for (std::string::size_type i = lenth_a - lenth_b; i != lenth_a; ++i){if (a[i] == b[i - interval])continue;else if (a[i] > b[i - interval]){//prin(a[i]);//prin(b[i - interval]);std::cout << ">\n";return 0;}else{std::cout << "<\n";return 0;}}std::cout << "=\n";}return 0;}

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