check if input is int float or char

[raonavneet]

can someone give me simple code in c to check if the input enter by a user is an integer, float or a character

[bvaessen]

Maybe there is something standard available in C for this. If not, you could try something like this:

int idx;
char str[STRINGLENGTH];
int numbersfound = 0;
int dotsfound = 0;
for (idx=0; (idx<STRINGLENGTH) && (str[idx]); idx++){
  numbersfound += ((str[idx] >= '0') && (str[idx] <= '9'));
  dotsfound += (str[idx] == '.');
}
if (numbersfound == STRINGLENGTH)
  printf("integer");
else if ((dotsfound == 1) && (numbersfound == STRINGLENGTH-1))
  printf("floating point");
else 
  printf("string");

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Ben Vaessen :: Home ::: Launch-IT :: Home

[Oigen]

Yea, that code seems to be pretty good. I compiled it and it worked as asked.

[dcs]

Originally Posted by raonavneet

can someone give me simple code in c to check if the input enter by a user is an integer, float or a character

Maybe check the input string to first see whether it can be converted to an integer, then check to see whether it can be converted to a float, otherwise, assume neither?