In this article, we will discuss the concept of the C program: Find the frequency of each character in the given string
In this post, we are going to learn how to find the frequency of the each character of the given string in C programming language
The program allows the user to enter a String and then it finds the frequency of the each character in the given string using for loop in C programing language
program 1
#include <stdio.h> #include <string.h> int main() { char str[100]; int i; int freq[256]={0}; printf("Enter a string\n"); gets(str); for(i=0; str[i]!='\0'; i++){ freq[str[i]]++; } for(i=0; i<256; i++){ if(freq[i] !=0){ printf("Character '%c' occurs %d time in te string\n",i,freq[i]); } } getch(); return 0; }
When the above code is executed, it produces the following result
The program allows the user to enter a String and then it finds the frequency of the each character in the given string using while loop in C programing language
program 2
#include <stdio.h> #include <string.h> int main() { char str[100]; int i; int freq[256]={0}; printf("Enter a string\n"); gets(str); i=0; while(str[i]!='\0'){ freq[str[i]]++; i++; } i=0; while(i<256){ if(freq[i] !=0){ printf("Character '%c' occurs %d time in the string\n",i,freq[i]); } i++; } getch(); return 0; }
When the above code is executed, it produces the following result
The program allows the user to enter a String and then it finds the frequency of the each character in the given string using do-while loop in C programing language
program 3
#include <stdio.h> #include <string.h> int main() { char str[100]; int i; int freq[256]={0}; printf("Enter a string\n"); gets(str); i=0; do{ freq[str[i]]++; i++; }while(str[i]!='\0'); i=0; do{ if(freq[i] !=0){ printf("Character '%c' occurs %d time in the string\n",i,freq[i]); } i++; } while(i<256); getch(); return 0; }
When the above code is executed, it produces the following result
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