方法调用很简单，sprintf itoa函数在我的其他博客也有详解，请翻阅查看，话不多说，直接撸代码:
#include <iostream> #include <string> #include <cstdlib> #include <sstream> #include <cstring> using namespace std; //第一种C风格的转化(以前一直喜欢的 sprintf 功能强大) void test() { char *s = "dong"; int a = 52; float b = .1314; char *buf = new char[strlen(s) + sizeof(a) + 1]; sprintf(buf, "%s%d%.4f", s, a, b); printf("%s\n", buf); } //半C半C++风格 void test1() { string s = "dong"; int a = 520; char *buf = new char[10];//2147483647 int最大值 _itoa(a, buf, 10); //itoa虽然可以转化为各种进制，但是注意不能是float或者double cout << s + buf << " | "; _itoa(a, buf, 16); cout << s + buf << endl; } //纯C++风格 void test2() { string s = "陈明东"; int a = 52; double b = .1314; ostringstream oss; oss << s << a << b; cout << oss.str() << endl; } //C++11新特性 void test3() { int a = 520; float b = 5.20; string str = "dong"; string res = str + to_string(a); cout << res << endl; res = str + to_string(b); res.resize(8); cout << res << endl; } int main() { test(); test1(); test2(); test3(); return 0; }
