c++ - leading 0's are not getting read from file -

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• how can preserve leading zeros when reading number , printing later? 1 answer

i reading content of file character character:

the file has:

000001111100000 

when use code read

int content;// converting char result in proper output. std::ifstream fin; fin.open("zero_one"); fin>>content; while (!fin.eof()) {     std::cout<<content;     fin>>content; } fin.close(); 

i output as: 1111100000 (the leading zeros not present) trailing zeros present.

the concern is: using >> operator read then, why don't leading zeros in output whereas trailing zeros in output.

also, if convert int char content variable output same content of file. why so? far know, difference between char , int size in bytes of variable.

if content int, reads data single integer: int value 1111100000. if content char, reads each character separately.

you can see difference if, in while loop, std::cout<<content<<'\n'; instead of std::cout<<content;. if content int see 1 line containing 1111100000, if it’s char see 15 lines, 1 each character of input.

if put spaces between each character of input file, read separate ints , results same, there still important difference: values of chars aren’t char(0) , char(1), '0' , '1' (0x30 , 0x31, respectively), ascii values of corresponding digits. ints on other hand 0 or 1.