What do atoi, atol, and stoi stand for?
I understand what said functions do, but I can't guess how their names were created, except that the last letter is from the return type.
atoi -> ASCII to integer.
atol -> ASCII to long.
atof -> ASCII to floating.
stoi -> string to integer.
stol -> string to long.
stoll -> string to long long.
stof -> string to float.
stod -> string to double.
stold -> string to long double.
atoi, atol, atof come from C and its godfather most probably is considered to be Ken Thompson the co-creator of the UNIX operating system and the creator of the B programming language which is the predecessor of the C programming language. The names are mentioned in the first UNIX Programmer's Manual November 3, 1971 and as you can see in the owner's label ken is mentioned which is the nickname of Ken Thomson:
stoi, stol, stoll, stof, stod and stold got in C++ since C++11. Consequently, the naming must have been a unanimous decision of the C++ committee. The original proposal N1803 though dates back in 2005. I couldn't find in the proposal why the named these functions after these names. My guess is that probably they wanted to keep the uniformity with their C "equivalents" mentioned above.
- Is this declaration UB?
- return type defaults to 'int' [-Wimplicit-int]
- What is the scope of `fesetround()`?
- Which specific optimization flag causes libm functions to be treated as pure?
- How to render text in SDL2?
- Why would you use 'extern "C++"'?
- Strange Behavior Compiler Ignoring NULL Check Unless I Print Something in the if Statement
- Fast inverse square root using fixed point instead of floating point
- What is the const qualifier attached to in C: the memory area or the pointer?
- GCC options for strictest C code?
- How to do an explicit fall-through in C
- How do compilers treat CONST qualifier when the pointer points to a memory location obtained with malloc()?
- C: cmocka headers - how to unittest?
- Why in C when I print a double with a one decimal it round it to the next number
- Android C to Java SWIG unable to compile: incompatible types: byte cannot be converted to SWIGTYPE_p_uint8_t
- GNU Make in Ubuntu giving fatal error: rpc/types.h: No such file or directory
- How can I exclude non-numeric keys? CS50 Caesar Pset2
- How change every struct in an array of pointers?
- Optimized 2x2 matrix multiplication: Slow assembly versus fast SIMD
- Simple frame by frame video decoder library
- GCC no longer implements <varargs.h>
- Contents of IO buffer unknown == unsafe?
- Avoiding strcpy overflow destination warning
- Sort program not working, not sure why
- Fast & accurate atan/arctan approximation algorithm
- What's the difference between strtok_r and strtok_s in C?
- How memory address for pointer to arrays is same as an element in 2D array?
- Which is the best way to suppress "unused variable" warning
- How to use ellipsis in c's case statement?
- Fast ceiling of an integer division in C / C++