c++ - how can i read a series of character value as character and integer simultaneously and can compare it? -

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i have file containing series of characters like:

......//////////0000000111111111222222222aaaaaaaaaaccccccccccccclllllllllllllllll

i have scan 1 one character , have compare if number or not in form of integer.

i used this:

int x=0; fscanf(fp,"%d",&x) if (x>=0 && x<=9)

i must have read numbers in file in integer form , have compare it.

in c++:

#include <iostream> #include <locale> char c; int i; while(std::cin >> c) {     if(isdigit(c)) {         = c - '0';     } else {         //todo:     } }

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