I am writing a program and one of the functions that I need to write is supposed to convert a string to type longlong. I am having quite a difficult time doing this. If someone could help me get started I can probably figure it out from there.
Also. I do not know if this is going in the right direction but I was thinking of subtracting character 0 from my string. I do not know if that is the correct way or not. The code would look like this.
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longlong strtolonglong(string s)
{
int longlong;
longlong = s - '0';
return longlong;
}
p.s. in addition to this code, my professor has included this code at the beginning of the program. I do not know if this matters or not. He has not told us what it does..
The string is actually already predefined in my program. My string is defined as follows:
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string e = "2718281828459045235360287471352662497757247093699959574966967""6277240766303535475945713821785251664274274663919320030599218174""1359662904357290033429526059563073813232862794349076323382988075""3195251019011573834187930702154089149934884167509244761460668082""2648001684774118537423454424371075390777449920695517027618386062""6133138458300075204493382656029760673711320070932870912744374704""7230696977209310141692836819025515108657463772111252389784425056""9536967707854499699679468644549059879316368892300987931277361782""1542499922957635148220826989519366803318252886939849646510582093""9239829488793320362509443117";
Well I am breaking it up into 10 digit parts. I have added a for-loop to your code in hopes to read each 10 digit section into my variable result however, each time it goes through the loop only the one digit is assigned to result. Is there a way to add them like you would have result end up being a 10 digit sequence of numbers? I feel like I probably have done this before I just can not seem to find my previous code.
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longlong strtolonglong(string s)
{
longlong result;
for(int i = 0; i < e.length() - 10; i++)
{
result = s[0] - '0';
}
return result;
}