Date: 2015apr23 Language: C/C++ Level: beginner Q. C/C++: convert a string into a float A. Like this:

float x = (float) atof("123.45");

Oddly, the atof() -- ascii to float -- returns a double not a float so you have to cast it. Other conversions:

double d = atof("123.45"); // string to double int i = atoi("123"); // string to int long l = strtol("12345", NULL, 10); // string to long unsigned long l = strtoul("12345", NULL, 10); // string to unsigned long