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  1. #include<stdio.h>
  2. #include<ctype.h>
  3. #include<stdlib.h>
  4. int main(void)
  5. {
  6.     char litera;
  7.     printf("prosze podac znak\n");
  8.     litera=getchar();
  9.     if(isalpha(litera)) printf("podano litere\n");
  10.         else if(isdigit(litera)) printf("podano liczbe\n");
  11.  
  12.     if(isalpha(litera)){
  13.        litera=tolower(litera);
  14.        putchar(litera);
  15.        putchar(' ');
  16.        putchar(toupper(litera));
  17.        printf("\n");
  18.     }
  19.     system("pause");
  20.     return 0;
  21. }
Success #stdin #stdout #stderr 0s 2116KB
comments (?)
stdin
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b
stdout
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prosze podac znak
podano litere
b B
stderr
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sh: 1: pause: not found
https://ideone.com/7FtWry
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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