C program to count characters with and without space

In this article, we will learn how to count and print the total number of characters present in any given string (provided by the user at run-time) with and without spaces.

Let's create a program that will count and print the total number of characters present inside any given string, with and without spaces. Here is the program:

#include<stdio.h>
#include<conio.h>
int main()
{
    char str[100];
    int i, countWithSpace=0, countWithoutSpace=0;
    printf("Enter any string: ");
    gets(str);
    for(i=0; str[i]!='\0'; i++)
    {
        countWithSpace++;
    }
    for(i=0; i<countWithSpace; i++)
    {
        if(str[i]==32)
            countWithoutSpace++;
    }
    countWithoutSpace = countWithSpace-countWithoutSpace;
    printf("\nNumber of character (with space) = %d", countWithSpace);
    printf("\nNumber of character (without space) = %d", countWithoutSpace);
    getch();
    return 0;
}

As the program was written in the Code::Blocks IDE, here is the sample run after a successful build and run. This is the first snapshot:

Now you can supply any string.say Hi, this is codescracker and press the ENTER key to see the total number of characters, with and without spaces, in the given string, as shown here in the second snapshot:

Here are some of the main steps used in the above program:

• Declare and initialize any two variables with 0, such as countWithSpace and countWithoutSpace.The first one refers to the total number of characters present inside the string with spaces, and the second one refers to the total number of characters present inside the string without spaces.
• Get any string in str
• Create a for loop that runs from the first character to the last.
• Increase the variable, say countWithSpace, inside the loop each time program flow enters the loop.
• When the null-terminated character ('\0') appears as a character within the string, nothing remains within the string and the program flow exits the first for loop.
• Now the countWithSpace variable holds the value of string length.
• And to count characters without spaces, we have to check how many spaces are present inside the string.
• Then subtract total characters (countWithSpace holds the value of total characters) with spaces; that will be the number of characters without space.
• Therefore, initialize it to the countWithoutSpace variable.
• Finally, output the values of both variables, countWithSpace and countWithoutSpace.

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