C Program to find minimum occurrence of character in a string

An array of characters is called a string.

Declaration

Following is the declaration for declaring an array is as follows −

char stringname [size];

For example − char string[50]; string of length 50 characters

Initialization

• Using single character constant −

char string[10] = { ‘H’, ‘e’, ‘l’, ‘l’, ‘o’ ,‘\0’}

• Using string constants −

char string[10] = "Hello":;

Accessing − There is a control string "%s" used for accessing the string till it encounters ‘\0’.

Finding minimum occurrence

The logic to find minimum occurrence of a character in a given string is as follows −

for(i=0; i
Program
Following is the C program to find minimum occurring character in a string.
#include
#define SIZE 100 // Maximum string size
#define CHARS 255 // Maximum characters allowed
int main(){
   char string[SIZE];
   int frequency[CHARS];
   int i = 0, minimum;
   int value;
   printf("Enter the string:
 ");
   gets(string);
   for(i=0; i
Output
When the above program is executed, it produces the following result −
Enter the string:
tutorialspoint
Minimum occurrence character is 'a' = 1 times.