my answer is correct but the question dose not accept

help
1

#include<stdio.h>
//Q-- First and Last Digit ||Problem Code: FLOW004

int main(){
int a,n,x,y,sum;
sum=0;
scanf("%d\n",&a);
for(int i=0;i<a;i++){
scanf("%d",&n);
y=n;
while(n!=0){
x=n%10;
if (y==n||n<10){
sum+=x;
}
n=n/10;
}
printf("%d\n",sum);
sum=0;}
return 0;}

2

Have you considered single digit numbers?

1 Like
3

I’ve considered single digit numbers and all digit numbers but still it’s not accepting my answer.
Can you please help me on these?

#include <stdio.h>

int first(int o)

{

int jjj, q;

q = o;

while (q > 9)

{

    q = q / 10;

    if (q <= 9)

    {

        jjj = q;

    }

}

return jjj;

}

int main()

{

int t, n, p[1000];

scanf("%d", &t);

for (int i = 0; i < t; i++)

{

    int q, jj;

    scanf("%d", &n);

    q = n % 10;

    if (n > 9)

    {

        jj = first(n);

    }

    else

    {

        jj = 0;

    }

    p[i] = q + jj;

}

for (int j = 0; j < t; j++)

{

    printf("%d\n", p[j]);

}

return 0;

}

4

Compiler warnings!

[simon@simon-laptop][19:13:09]
[~/devel/hackerrank/otherpeoples]>./compile-latest-cpp.sh 
Compiling vivekratr-FLOW004.cpp
Executing command:
  g++ -std=c++17 vivekratr-FLOW004.cpp -O3 -g3 -Wall -Wextra -Wconversion -DONLINE_JUDGE -D_GLIBCXX_DEBUG    -fsanitize=undefined -ftrapv
vivekratr-FLOW004.cpp: In function ‘int main()’:
vivekratr-FLOW004.cpp:37:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   37 |     scanf("%d", &t);
      |     ~~~~~^~~~~~~~~~
vivekratr-FLOW004.cpp:45:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   45 |         scanf("%d", &n);
      |         ~~~~~^~~~~~~~~~
vivekratr-FLOW004.cpp: In function ‘int first(int)’:
vivekratr-FLOW004.cpp:27:12: warning: ‘jjj’ may be used uninitialized in this function [-Wmaybe-uninitialized]
   27 |     return jjj;
      |            ^~~
Successful

Edit:

Ah - as it happens, the warnings here are irrelevant.

You are, however, getting the wrong answer for single-digit numbers.

2 Likes
5

Is it correct now?
#include <stdio.h>
int main()
{
int t,n,p[1000];
scanf("%d", &t);
for (int i = 0; i < t; i++)
{
int q;
int e = 0;

    scanf("%d", &n);
    q = n;
    while (q > 0)
    {
        int p;
        p = q % 10;
        q = q / 10;
        if (p == 4)
        {
            e++;
        }
        

    }
    p[i] = e;
    
}
for (int j = 0; j < t; j++)
{
    printf("%d\n",p[j]);
}


return 0;

}