any predefined function to convert string to int
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hello.... i have to read a file that has hex values.....i read them as string initially,i would want to know if there is already a function to convert this string(of hex) directly to int?....like we have for converting string(of int) to integer using atoi() fnction....?
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hello.... i have to read a file that has hex values.....i read them as string initially,i would want to know if there is already a function to convert this string(of hex) directly to int?....like we have for converting string(of int) to integer using atoi() fnction....?
sscanf()using the%xformat specifier.Ryan
"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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hello.... i have to read a file that has hex values.....i read them as string initially,i would want to know if there is already a function to convert this string(of hex) directly to int?....like we have for converting string(of int) to integer using atoi() fnction....?
Here's one way to do it: ------------------------ #include #include using namespace std; int main(int argc, char* argv[]) { const char* Number = "baadf00d beeff00d"; istringstream ss; ss.str(Number); unsigned int num; while ( ss >> hex >> num ) { // Converted...Output the number in decimal. cout << num << endl; } return 0; } Steve
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sscanf()using the%xformat specifier.Ryan
"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
thank u ryan and stephen!..... :-)
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hello.... i have to read a file that has hex values.....i read them as string initially,i would want to know if there is already a function to convert this string(of hex) directly to int?....like we have for converting string(of int) to integer using atoi() fnction....?
You can use
*scanf-type functions, but functions specifically designed to do convert strings to numeric values already exist and will likely perform better than the*scanf-type functions. You do not need to use a shotgun to kill a fly... :) Look up thestrtol/wcstol,strtoul/wcstoul, andStrToIntExfunctions. TheStrToIntExfunction handles leading whitespace, and sign indicator (ignored), and a leading0xhex. specifier. Much more robust parsing than you get doing something simple like using"%x"with a*scanf-type function. Peace! -=- James
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