10+ C Programs for Beginners: Learn Coding Basics Easily

Write a c program to find the greatest number among four numbers

#include<stdio.h>

//Write a program to find the greatest number among four numbers

int main()
{
	int a,b,c,d;
	printf("input four different numbers=");
	scanf("%d %d %d %d",&a,&b,&c,&d);
if(a>b&&a>c&&a>d)
{
printf("%d is the greatest number",a);
}
else if(b>c&&b>d)
{
printf("%d is the greatest number",b);
}
else if(c>d)
{
printf("%d is the greatest number",c);
}
else
{
printf("%d is the greatest number",d);
}
}

write a c program to find the average of three number

#include <stdio.h>

int main() {
    float num1, num2, num3, average;

    // Ask the user to enter three numbers
    printf("Enter three numbers: ");
    scanf("%f %f %f", &num1, &num2, &num3);

    // Calculate the average
    average = (num1 + num2 + num3) / 3;

    // Display the average
    printf("The average of %.2f, %.2f, and %.2f is: %.2f\n", num1, num2, num3, average);

    return 0;
}

Write a program to store 10 numbers in a array and print out the greatest number among them

#include<stdio.h>

//Write a program to store 10 numbers in a array and print out the greatest number among them
int main(){
	
	 int a[10];
    int i;
    int greatest;
    printf("Enter ten values:");
    //Store 10 numbers in an array
    for (i = 0; i < 10; i++) {
        scanf("%d", &a[i]);
    }
    //Assume that a[0] is greatest
    greatest = a[0];
    for (i = 0; i < 10; i++) {
        if (a[i] > greatest) 
		{
        greatest = a[i];
    	}
    }
    printf("Greatest of ten numbers is %d", greatest);
    return 0;
	
	return 0;
}

Write a program to input n numbers and find out largest and smallest among them

#include<stdio.h>

//Write a program to input n numbers and find out largest and smallest among them

int main()
{
    int i, n, lar,sm, elem;
    printf ("Enter total number of elements n: ");
    scanf ("%d", &elem);
    printf ("Enter first number n: ");
    scanf ("%d", &n);
    lar = n;
    sm=n;
    for (i=1; i<= elem -1 ; i++)
    {
        printf ("Enter another number n: ");
        scanf ("%d",&n);
        if (n>lar)
        lar=n;
        if (n<sm)
        sm=n;
    }
    printf ("\n The largest number is %d", lar);
    printf ("\n The smallest number is %d", sm);
    return 0;
}

Write a program to search whether a number entered by the user is following the data set or not. Data set are  12,45,56,67,78,560,47,78

#include<stdio.h>
//Write a program to search whether a number entered by the user is following the data set or not. Data set are  12,45,56,67,78,560,47,78
int main(){
	
	 int dataSet[] = {12, 45, 56, 67, 78, 560, 47, 78};
    int userNumber, i, isFound;

    printf("Enter a number: ");
    scanf("%d", &userNumber);

    isFound = 0;
    for (i = 0; i < 8; i++) {
        if (dataSet[i] == userNumber) {
            isFound = 1;
            break;
        }
	}
	
	if (isFound) {
        printf("The number is in the data set.\n");
    } else {
        printf("The number is not in the data set.\n");
    }

    return 0;
}

Write a program to read salaries of 200 employees and count the number of employees getting salary of 5000 to 10000

#include<stdio.h>

//Write a program to read salaries of 200 employees and count the number of employees getting salary of 5000 to 10000
int main(){
	
    int salary[200], i, count = 0;

    // Read salaries of up to 200 employees
    for (i = 0; i < 200; i++) {
        printf("Input salary of employee %d: ", i + 1);
        scanf("%d", &salary[i]);

        // Count the number of employees getting a salary between 5000 and 10000
        if (salary[i] > 5000 && salary[i] < 10000) {
            count++;
        }
    }

    printf("Number of employees getting salary between 5000 and 10000: %d\n", count);

    return 0;
	
}

Write a program to read the age of 40 students and count the numbers of students aged between 15 and 22

#include<stdio.h>

//Write a program to read the age of 40 students and count the numbers of students aged between 15 and 22

int main() {
    int age[40], i, count = 0;

    // Read ages of 40 students
    for (i = 0; i < 40; i++) {
        printf("Input age of student %d: ", i + 1);
        scanf("%d", &age[i]);

        // Count the number of students aged between 15 and 22
        if (age[i] >= 15 && age[i] <= 22) {
            count++;
        }
    }

    printf("Number of students aged between 15 and 22: %d\n", count);

    return 0;
}

Write a program to read the age of 100 persons and count the number of persons in the age group between 50 and 60.

#include <stdio.h>

//Write a program to read the age of 100 persons and count the number of persons in the age group between 50 and 60.

int main() {
    int age[100], i, count = 0;

    // Read ages of 100 persons
    for (i = 0; i < 100; i++) {
        printf("Enter the age of person %d: ", i + 1);
        scanf("%d", &age[i]);

        // Count the number of persons aged between 50 and 60
        if (age[i] >= 50 && age[i] <= 60) {
            count++;
        }
    }

    printf("Number of persons in the age group 50 to 60 is %d\n", count);

    return 0;
}

Write a program to store the marks obtained 'n' students and count the number of students who obtained marks greater than 70.Also count the number of students who are failed

#include <stdio.h>

//Write a program to store the marks obtained 'n' students and count the number of students who obtained marks greater than 70.Also count the number of students who are failed

int main() {
    int marks[100], i, n, count_gt70 = 0, count_failed = 0;

    printf("Enter the number of students: ");
    scanf("%d", &n);

    // Read marks of n students
    for (i = 0; i < n; i++) {
        printf("Enter the marks of student %d: ", i + 1);
        scanf("%d", &marks[i]);

        // Count the number of students who obtained marks greater than 70
        if (marks[i] > 70) {
            count_gt70++;
        }

        // Count the number of students who are failed
        if (marks[i] <= 35) {
            count_failed++;
        }
    }

    printf("Number of students who obtained marks greater than 70 is %d\n", count_gt70);
    printf("Number of students who are failed is %d\n", count_failed);

    return 0;
}

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