Cocos2D-X: Convert String to Integer and Testing For Numeric Value

These can be done quite simply by converting the String to a Cocos2D-X String object and then calling the "intValue()" function on the String. If it is a numeric value, the function will return the value which you can use, or if it is not a numeric value, it will return 0 so it also serves for a test for numeric value, unless of course the value is "0" and you should test for that first.

int val; String* str = String::create(“123”); // test for 0 if(str->compare(“0”) == 0){    val = 0; } else {    val = str->intValue();    if(val == 0){        // String is not numeric, handle the error here    }    else{        // String is numeric and its value is saved in the “val” variable    } }