C Programming: Find maximum occurring character in a string
C String: Exercise-10 with Solution
Write a program in C to find the maximum number of characters in a string.
Sample Solution:
C Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define str_size 100 // Declare the maximum size of the string
#define chr_no 255 // Maximum number of characters to be allowed
int main() {
char str[str_size]; // Declare a character array to store the string
int ch_fre[chr_no]; // Declare an array to store the frequency of characters
int i = 0, max; // Declare variables for iteration and finding the maximum frequency
int ascii; // Variable to hold the ASCII value of a character
printf("\n\nFind maximum occurring character in a string :\n"); // Display information about the task
printf("--------------------------------------------------\n");
printf("Input the string : ");
fgets(str, sizeof str, stdin); // Read a string from the standard input (keyboard)
for (i = 0; i < chr_no; i++) { // Initialize the frequency of all characters to zero
ch_fre[i] = 0;
}
/* Read for frequency of each character */
i = 0;
while (str[i] != '\0') { // Loop until the end of the string ('\0' character is encountered)
ascii = (int)str[i]; // Get the ASCII value of the current character
ch_fre[ascii] += 1; // Increment the frequency count for that character
i++;
}
max = 0; // Initialize the index of the character with maximum frequency
for (i = 0; i < chr_no; i++) {
if (i != 32) { // Exclude space (' ') character
if (ch_fre[i] > ch_fre[max]) {
max = i; // Update the index of the character with maximum frequency
}
}
}
printf("The Highest frequency of character '%c' appears number of times : %d \n\n", max, ch_fre[max]); // Display the character with maximum frequency and its count
return 0; // Return 0 to indicate successful execution of the program
}
Sample Output:
Find maximum occurring character in a string : -------------------------------------------------- Input the string : Welcome to w3resource The Highest frequency of character 'e' appears number of times : 4
Flowchart:
C Programming Code Editor:
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