#include<stdio.h>

void main() {
    int number1, number2, number3;

    printf("n Find Out Largest Number Among Three Numbers");
    
    printf("nEnter First Number: ");
    scanf("%d", &number1);
    
    printf("n Enter Second Number: ");
    scanf("%d", &number2);
    
    printf("n Enter Third Number: ");
    scanf("%d", &number3);
    
    if (number1 > number2) {
        if (number1 > number3)
            printf("n the largest number is: %d", number1);
        else
            printf("n the largest number is: %d", number3);
    } 
    else if (number2 > number3)
        printf("n the largest number is: %d", number2);
    else
        printf("n the largest number is: %d", number3);
}

Find Out Largest  Number Among Three Numbers
Enter First Number: 15
Enter Second Number: 5
Enter Third Number: 10
the largest number is: 15