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  1. #include <stdio.h>
  2.  
  3. #define MAX 20
  4.  
  5. int isNumber(char str[]);
  6.  
  7. int main(void){
  8.     char str[MAX];
  9.  
  10.     while(fgets(str,MAX,stdin)){
  11.         printf("%s\n",isNumber(str)?"number":"string");
  12.     }
  13.  
  14.     return 0;
  15. }
  16.  
  17. int isNumber(char str[]){
  18.     int i;
  19.     char c=0;
  20.     return (sscanf(str,"%d%[^\n]",&i,&c)==1)&&(c==0);
  21. }
  22.  
Success #stdin #stdout 0s 2252KB
comments (?)
stdin
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1234
1234abncdef
ab^d34x
-92837
+37
stdout
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number
string
string
number
number
https://ideone.com/FevxYG
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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