Submission #1995162

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Source Code Expand

#include <stdio.h>
#include <string.h>
#define N 100000
int main()
{
	int i, len;
	char ch, s[N];
	scanf("%s", s);
	len = strlen(s);
	
	for (ch = 'a'; ch <= 'z'; ch++) {
		for (i = 0; i <= len; i++) {
			if (ch == s[i])
				break;
			else if (i == len) {
				printf("%c", ch);
				goto label;
			}	
		}
		if (ch == 'z')
			printf("None");
	}
	
	label : ;
	
	return 0;
} 

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:8:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", s);
  ^

Judge Result