C Exercises: Reads an integer and count number of 3s in the given number

C Basic Declarations and Expressions: Exercise-83 with Solution

Write a C program which reads an integer (7 digits or fewer) and count number of 3s in the given number.

Sample Input: 538453

Sample Solution:

C Code:

#include<stdio.h>
int count_three( int );


int main()
{
    int num;   
    printf( "Input a number: " );
    scanf("%d", &num);    
    printf("The number of threes in the said number is %d\n", count_three(num) );
    return 0;
}

int count_three(int num) 
{
    int ctr = 0;
    int remainder;
    
    while(num > 0) {
        remainder = num % 10;
        num /= 10;
        
        if(remainder == 3)
            ctr++;
    }
    
    return ctr;
}

Sample Output:

Input a number: The number of threes in the said number is 2.

Pictorial Presentation:

Flowchart:

C programming Code Editor:

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