Simple Program for Count Vowels String using Pointer in C

About this program

This is an example program in c pointer example programs. Read the concept first: C Pointers, then study the code and output below.

Simple Program for Count vowels String Using Pointer

/* Simple Program for Count vowels String Using Pointer in C*/
/* Print Pointer Address Program,C Pointer Examples */

#include<stdio.h>

int main() {
  char str[20], *pt;
  int i = 0, c = 0;
  printf("Pointer Example Program : Count Vowels In String \n");
  printf("\nEnter Any string in small [below 20 chars] : ");
  gets(str);
  pt = str;
  while (*pt != '\0') {
    if (*pt == 'a' || *pt == 'e' || *pt == 'i' || *pt == 'o' || *pt == 'u')
      c++;
    i++;
    pt++;
  }
  printf("\nLength of String : %d", i);
  printf("\nVowels Count In the String : %d", c);
  printf("\nConstant Count in the String : %d", (i - c));

  return 0;
}

Sample Output

Pointer Example Program : Count Vowels In String

Enter Any string in small [below 20 chars] : pointer

Length of String : 7
Vowels Count In the String : 3
Constant Count in the String : 4

How It Works

This C program demonstrates Simple Program for Count Vowels String using Pointer. It first reads the required values as input, then walks through the data with a loop to compute the result, and finally prints the output shown in the Sample Output above.

1. Declare the variables that hold the program’s data.
2. Read the input values that the program will work with.
3. Iterate over the data using a loop to apply the logic.
4. Use conditional statements to handle the different cases.
5. Print the final result to the console so you can compare it with the sample output.

Try changing the input values and re-running the program to see how the output changes — this is the fastest way to understand how the logic behaves.

Related Pages

Learn the concept first, then study the code:

• C Programs — Browse all C Programs.
• C Pointers — Concept — pointers, addresses and dereferencing.
• Simple Pointer Example Program — More in c pointer example programs.
• Simple Program for Print address of Variable Using Pointer in C — More in c pointer example programs.