code. compile. run. debug. share.
Source Code
Language
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
char buf[256];
FILE* fIn = fopen("input.txt", "r");
FILE* fOut = fopen("output.txt", "w");
fscanf(fIn, "%s",buf);
fscanf(fIn, "%s",buf+strlen(buf));
unsigned int counters['z'-'a'+1] = {0};
for(char *pch=buf;*pch;pch++) {
if (isalpha(*pch))
counters[tolower(*pch)-'a']++;
}
for(size_t i=0;i<('z'-'a'+1);i++)
if (counters[i]==1)
fprintf(fOut, "%c", (char)('a' + i));
return 0;
}
hello world
dehrw
Compiling Program...
Standard Input:
Interactive Console
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Program is not being debugged. Click "Debug" button to start program in debug mode.
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