o/10=o; o%10=s; I think it have some issue It should be o=o/10; or o/=10; s=o%10;

@deepakChaurasia30

its best practice to write , "using namespace std ;" within the function definition. start doing it from now dont use it as a global variable

am new member in this group, i study EEE department. and i want to learn C program. How do i learn C program?

// Online C compiler to run C program online #include <stdio.h> int sn(int o) { int s,n; while (o!=0) { // int n; o%10=s; n=n+s; if (o<10) o/10=o; if(o<10) o=0; } return n; } int main() { int i,j,k; printf("Enter Range of no.\n"); scanf("%d%d",&i,&j); for(int l=i;l<=j;l++) { if(sn(l)%3==0) printf("%d is not prime no.",l); else printf("%d is a prime ",l); } }

Hello, I need a blas ?gemm(a[i,k] = sum_j b[i,j] c[j,k]) like function: a[i,k,x] = sum_j b[i,j,x] c[j,k,x] , is there any function can do it?

It happens due to maths practice 😂

I have two kinds of data: const char * char * I'm writting a function that will receive one of them alternately and return char * Inside of function I will handle different operations on a copy of received string. How should be signature? char *x ( char *str ); or char *x ( void *str ); ?

It's not possible put void as type of argument

I have two kinds of data: const char * char * I'm writting a function that will receive one of them alternately and return char * Inside of function I will handle different operations on a copy of received string. How should be signature? char *x ( char *str ); or char *x ( void *str ); ?

yes... the compiler warns on using const char as char... so passing as void would receive anything and would cast only inside the function as (char *)

I would always prefer a specific type pointer over void* if possible and only use void* if it's some raw data that can be different things depending on some dynamic conditions

The question is, are you sure you need nonconst char* here?

yes this is why I'm asking... sometimes I will pass const char, some times only char. I could write two functions, but due to memory allocation on copy and manipulation, it is better to have in a single function. So is my doubt.

yes... You understood! It is the kind of thing in C we have no examples, just follow intuition.. but there are some forks, so is always good have a different opinion. Thank you much!!!

Good thing in C++, that it won't actually compile code that has inconsistent constness or if you try to modify something const :)

but in some cases it may make a little bit of sense

Well, if you cast away const and do not want undefined behaviour, you may have to cast volatile in too

I cant find the problem in this code

#include<iostream> #include<cmath> using namespace std; int main(){ int a,b,n; cin>>a>>b; n=(a+b)/2; if ( a<pow(10,9)) && b<pow(10,9)) cout<<n; }

You may search it in google assistant👈

But how?

Given two numbers A , B. Print the summation of digits of all lucky numbers between A , B inclusive. Input First line contains a number T (1≤T≤100) number of test cases. Next T lines contain two numbers A , B (1≤A,B≤1018). It's guaranteed that |A−B| does not exceed 10 ^ 4 . Output For each test case , print the summation of digits of all lucky numbers between A , B

The lucky number is any positive number that its decimal representation contains only 4 and 7. For example: numbers 4, 7, 47 and 744 are lucky and numbers 5, 17 and 174 are not.

Hi i have 2 files connected via header and because of that the second file compiles before my main file and all the variables in it which i have definitions for them in my main file, what can i do? I compiles and says the variables are undeclared

Given two numbers A , B. Print the summation of digits of all lucky numbers between A , B inclusive. Input First line contains a number T (1≤T≤100) number of test cases. Next T lines contain two numbers A , B (1≤A,B≤1018). It's guaranteed that |A−B| does not exceed 10 ^ 4 . Output For each test case , print the summation of digits of all lucky numbers between A , B

#include<stdio.h> #include<string.h> void reverse(char str[]) { int len=0; int i; printf("\nEnter the string:: "); gets(str); for ( i = 0; str[i]!='\0'; i++) { len++; } char rev[200]; for(i=len-1;i>=0;i--) { rev[len-i-1]=str[i]; } printf("\nReverse is : %s",rev); } void characters(char str[]) { int len=0; int i; printf("\nEnter the string:: "); gets(str); for ( i = 0; str[i]!='\0'; i++) { if(str[i] !=' ') len++; } printf("\n No of characters are :%d",len); } void copy(char str[]) { int len=0; int i; printf("\nEnter the string:: "); gets(str); for ( i = 0; str[i]!='\0'; i++) { len++; } char rev[200]; for ( i = 0; str[i]!='\0'; i++) { rev[i]=str[i]; } printf("\n New String is :%s",rev); } void vowels(char str[]) { int i,vow=0; printf("\nEnter the string:: "); gets(str); for ( i = 0; str[i]!='\0'; i++) { if(str[i]=='a' str[i]=='e' str[i]=='i' str[i]=='o' str[i]=='u' str[i]=='A' str[i]=='E' str[i]=='I' str[i]=='O' str[i]=='U' ) vow++; } printf("\n No of vowels in the string is : %d",vow); } void consonant(char str[]) { int i,con=0,len=0; printf("\nEnter the string:: "); gets(str); for ( i = 0; str[i]!='\0'; i++) { len++; } for ( i = 0; str[i]!='\0'; i++) { if(str[i]== 'a' str[i]=='e' str[i]=='i' str[i]=='o' str[i]=='u' str[i]=='A' str[i]=='E' str[i]=='I' str[i]=='O' str[i]=='U' || str[i]==' ' ) con++; } printf("\n No of consonants in the string is : %d",len-con); } void aplhabet(char str[]) { int count=0,i; printf("\nEnter the string:: "); gets(str); for ( i = 0; str[i]!='\0'; i++) { count++; } for (int i = 0; i < count; i++) { for (int j = i + 1; j < count; j++) { if (str[i]+1 > str[j]+1 ) { char temp; temp= str[i]; str[i]= str[j]; str[j]= temp; } } } printf("\n %s",str); } int main() { int ch; char str[100]; char sel='y'; printf("\n1.Reverse the string\n"); printf("\n2.Count the no. of characters in a string\n"); printf("\n3.Copy one string from another string\n"); printf("\n4.Count no of vowels\n"); printf("\n5.Count no of Consonants and no of punctuations\n"); printf("\n6.Arrange in Alphabetical ordeer\n"); printf("\n enter your choice :: "); scanf("%d",&ch); switch (ch) { case 1: reverse(str); break; case 6: characters(str); break; case 2: copy(str); break; case 3: vowels(str); break; case 4: consonant(str); break; case 5: aplhabet(str); break; default: printf("\n Wrong choice entered"); } return 0; }

why it is not taking input?

You mean that "scanf("%d",&ch);" doesn't work?

Guys can you help me complete the following function please🙏 Def XOR (a,b) # both a and b are booleans # if both are equal return true # else return false

Hi. Can anyone explain how should I solve Time Limit Exceeded Error ?

Guys can you help me complete the following function please🙏 Def XOR (a,b) # both a and b are booleans # if both are equal return true # else return false

I don't think such error exists. Where did you get that?

You’re right The platform I should give my code to it ,gives this error because of time limit

OH! That's completely different case then. Your program/algorithm is slow.

So I should change it completely?

Depends on the problem, on the decomposition, how you currently feel etc... it's up to you