#include #include int countNonRepeatedCharacters$($char $*$compString$)\{$ int charCount$[256]=\{0\}$; $//$ Array to store character counts int nonRepeatedCount $=0$; $//$ To count non$-$repeated characters int length $=$ strlen$($compString$)$; $//$ Get the length of the string $//$ Step $1$: Count the occurrences of each character for $($int i $=0$; i $<$ length; i$++)\{$ charCount$[($unsigned char$)$compString$[$i$]]++$; $//$ Increment the count for the character $\}//$ Step $2$: Count characters that are not repeated for $($int i $=0$; i $<$ length; i$++)\{$ if $($charCount$[($unsigned char$)$compString$[$i$]]==1)\{$ nonRepeatedCount$++$; $//$ Increment non$-$repeated count if the count is $1\}\}$ return nonRepeatedCount; $//$ Return the final count of non$-$repeated characters $\}$ int main$()\{$ char compString$[100]$; $//$ Buffer for the input string printf$("$Enter the string: $")$; fgets$($compString$,$ sizeof$($compString$),$ stdin$)$; $//$ Read the input string $//$ Remove newline character if present size$\_$t len $=$ strlen$($compString$)$; if $($len $>0$ && compString$[$len $-1]==\text{'}$

$\text{'})\{$ compString$[$len $-1]=\text{'}\backslash 0\text{'}$; $\}//$ Step $3$: Get the count of non$-$repeated characters int result $=$ countNonRepeatedCharacters$($compString$)$; $//$ Step $4$: Print the result printf$("\%$d

$",$ result$)$; return $0$; $\}$