函数原型：string to_string (int val);string to_string (long val);string to_string (long long val);string to_string (unsigned val);string to_string (unsigned long val);string to_string (unsigned long long val);string to_string (float val);string to_string (double val);string to_string (long double val);
功能：
将数值转化为字符串。返回对应的字符串。
例子：
#include <iostream> #include <string> using namespace std; int main() { string pi = "pi is " + std::to_string(3.1415926); string perfect = to_string(1 + 2 + 4 + 7 + 14) + " is a perfect number"; cout << pi << '\n'; cout << perfect << '\n'; system("pause"); return 0; }参考：https://blog.csdn.net/u010455041/article/details/50097251
转载于:https://www.cnblogs.com/leebxo/p/11305338.html
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