如何在c / c ++中将一个int添加到char []

Question

i have a code like this:

int i = 123;
char myString[100];
strcpy(myString, "my text");

and how i want to add the 123 after "my text". how to do this in c/c++?

at the end myString sould be my test123

Answer 1

In C++:

std::stringstream ss;
ss << "my text" << i;
std::string resultingString = ss.str();

There's no such thing as C/C++ .

Answer 2

在C ++ 11中：

std::string result = "my text" + std::to_string(i);

Answer 3

(To complement Luchian's answer)

In C:

char myString[128];
int i = 123;
snprintf(myString, sizeof(myString), "My Text %d", i);

Answer 4

假设mystring足够大，在这个例子中就是这样：

sprintf( myString, "my text%d", 123 );

Answer 5

使用C ++中的Qt QString对象：

std::cout << QString("my text %1").arg(123456);