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  1. #include <stdio.h>
  2. #include <ctype.h>
  3.  
  4. int main(void) {
  5.     char s[100];
  6.     printf("Enter a line of text: ");
  7.     fgets(s, sizeof(s), stdin);
  8.  
  9.     printf("\nUppercase: ");
  10.     for (int i = 0; s[i] != '\0'; i++) {
  11.         putchar(toupper((unsigned char)s[i]));
  12.     }
  13.  
  14.     printf("Lowercase: ");
  15.     for (int i = 0; s[i] != '\0'; i++) {
  16.         putchar(tolower((unsigned char)s[i]));
  17.     }
  18.  
  19.     return 0;
  20. }
Success #stdin #stdout 0s 5312KB
comments (?)
stdin
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Standard input is empty
stdout
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Enter a line of text: 
Uppercase: ɯV��Lowercase: ɯv��
https://ideone.com/qNaFXn
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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