在char*中附加一个int

Question

你会如何char*在c ++中附加一个整数？

Answer 1

首先将int转换为char*使用sprintf():

char integer_string[32];
int integer = 1234;

sprintf(integer_string, "%d", integer);

然后将其附加到您的其他字符*,使用strcat():

char other_string[64] = "Integer: "; // make sure you allocate enough space to append the other string

strcat(other_string, integer_string); // other_string now contains "Integer: 1234"

Answer 2

你也可以使用stringstreams.

char *theString = "Some string";
int theInt = 5;
stringstream ss;
ss << theString << theInt;

然后可以使用访问该字符串 ss.str();