is this correct usage of nested if

Question

int a,b,c;
   printf("enter 3 number");
   scanf("%d%d%d",&a,&b,&c);
   if (a<b){
       
        if (b<c){
            printf("the gretest number is %d ", c);
        
            
       }else {
           printf("the gretest number is %d ", b);
           
       }
       
           
      
   }else {
       printf("the gretest number is %d ",a);
   }

    return 0;
}

Answer 1

Assuming your code is correctly put into a function, then yes, this is a syntactically correct nested if, the code compiles and runs without any errors.

However, the logic you implemented to find the largest number of 3 numbers is not correct.

If you enter the input "2 1 3" your program says, the largest number is 2 (but we all know 3 is the largest).

Try to analyze your code, what would it do with the above input and you'll figure out how to fix it.

If you need further help, ask away!

Good luck! :)

Answer 2

This code not completely correct because 'a' has been not compared with 'c'.

The correct can be written this type

 int a,b,c;
   printf("enter 3 number");
   scanf("%d%d%d",&a,&b,&c);
   if (a<b){
       
        if (b<c){
            printf("the gretest number is %d ", c);
        
            
       }else {
           printf("the gretest number is %d ", b);
           
       }
       
           
      
   }else {

if(a>c){
       printf("the gretest number is %d ",a);

else{

printf("the gretest number is %d ",c);
   }

    return 0;
}

Comments

You have a lot of syntax errors in this code.
This is the fixed code:

   int a,b,c;
   printf("enter 3 number: ");
   scanf("%d%d%d",&a,&b,&c);
   if (a<b){
        if (b<c){
        printf("the gretest number is %d ", c);
        } else {
        printf("the gretest number is %d ", b);
    } else {
        if(a>c){
            printf("the gretest number is %d ",a);
        } else {
            printf("the gretest number is %d ",c);
        }
    }
    return 0;

Answer 3

In nested if statements we have to use the if followed by elseif then another elseif as many as require and lastly use else here is your corrected code.

#include <stdio.h>

int main() {
    int a, b, c;
    printf("Enter 3 numbers: ");
    scanf("%d%d%d", &a, &b, &c);

    if (a == b && b == c) {
        printf("All three numbers are equal: %d\n", a);
    } else if (a >= b && a >= c) {
        printf("The greatest number is %d\n", a);
    } else if (b >= a && b >= c) {
        printf("The greatest number is %d\n", b);
    } else {
        printf("The greatest number is %d\n", c);
    }

    return 0;
}