#include<stdio.h> #include<stdlib.h> #include<ctype.h> int main(int argc, char* argv[]) { if ( argc == 3) { if ((isdigit(argv[1])) && (isdigit(argv[2])) ) { // printf("%d ",argv[1]*argv[2]); } else { printf("Please enter integer values only \n"); } } else { printf(" Invalid Number of arguments \n "); } return 0; }

isdigit is accepting address char * not char. First check if the arguments only contain numeric. Than convert it first using strtod or anything equals.

Extra note The standards require that the argument c for these functions is either EOF or a value that is representable in the type unsigned char. If the argument c is of type char, it must be cast to unsigned char, as in the following example: char c; ... res = toupper((unsigned char) c); This is necessary because char may be the equivalent of signed char, in which case a byte where the top bit is set would be sign extended when converting to int, yielding a value that is outside the range of unsigned char. The details of what characters belong to which class depend on the locale. For example, isupper() will not recognize an A-umlaut (Ä) as an uppercase letter in the default C locale.

I am beginner how i can improve my c++ programming language

I need help with: Struct a []{ Int data, Int valid } Array [4]; If (a[1].valid==1 && a[2].valid==1 && a[3].valid==1){ Return false; } How to code this logic with for loop

I need help with: Struct a []{ Int data, Int valid } Array [4]; If (a[1].valid==1 && a[2].valid==1 && a[3].valid==1){ Return false; } How to code this logic with for loop

for (int i=0 ; i < 3 ; i++){ // what logic to put here for Check if(a[1].valid ==1 && .......) }

But how about the && of all the index

any one who know this?

how ?

I need help with: Struct a []{ Int data, Int valid } Array [4]; If (a[1].valid==1 && a[2].valid==1 && a[3].valid==1){ Return false; } How to code this logic with for loop

#include <iostream> #include <vector> #include<algorithm> using namespace std; int main() { vector<vector<int>> ans; vector<int> v; v.push_back(1); v.push_back(2); v.push_back(3); ans.push_back(v); v.clear(); v.push_back(4); v.push_back(5); v.push_back(6); v.push_back(7); ans.push_back(v); v.clear(); v.push_back(8); v.push_back(9); v.push_back(10); v.push_back(11); ans.push_back(v); v.clear(); for(auto it: ans) { for(auto k: it) cout<<k<<" "; } //OUTPUT 1 2 3 4 5 6 7 8 9 10 11 reverse(ans.begin(),ans.end()); cout<<"\n"; for(auto it: ans) { for(auto k: it) cout<<k<<" "; } //OUTPUT 8 9 10 11 4 5 6 7 1 2 3 return 0; } I want output to be 11 10 9 8 7 6 5 4 3 2 1

use it.rebegin() to iterate from the end of each vec

Please guys can anyone help me to convert this to a for loop char *_strcat(char *dest, char *src) { int a; int b; a = 0; while (dest[a] != 0) { a++; } b = 0; while (src[b] != 0) { dest[a] = src[b]; a++; b++; } return (dest); }

can u code it please

for (auto it = v.rbegin(); it != v.rend(); it++)

Make your projects, read articles/books, practice

Please give me some articles , books

If you passed beginner level I suggest these 3 books: Effective C++, More Effective C++, Modern Effective C++ from Scott Meyers Then fluentcpp.com is a good resource for advanced reading. I don't have good suggestions for complete beginners, I was learning by shitty books, making mistakes and asking questions on toxic russian programming forums 😄 Try also this:

#include<stdio.h> int main() { int bs,da,hra; float gs; printf("please enter your basic salary "); scanf("%d",&bs); da=bs*.4; hra=bs*.2; gs=da+bs+hra; printf("%f",gs); getch(); }

Please I have error in dec c++ say (Id returned 1exite status)

Please I have error in dec c++ say (Id returned 1exite status)

Dec c++?

Yes

What's that?

Dev c++

what makes c++ different from other programming languages?

Find the errors in the following code and explain why. include <iostream> using namespace std; class Book { public: Book(int i = 0 ); void displayId(); private: int id; }; Book::Book(int i) { id = i; } void Book::displayId() { cout << id << endl; } void main() { Book X( 10 ); Book* Y; Y = new Book( 20 ); X.displayId(); Y.displayId(); (*Y).displayId(); Y->displayId(); delete Y; delete X; delete &X; Y = &X; Y->displayId(); delete Y; Y = new Book( 30 ); Y = new Book( 40 ); delete Y; delete Y; }

Hey I have written a create function in the struct node... but I am getting error as linked_list.c: In function ‘create’: linked_list.c:47:13: error: parameter name omitted 47 | void create(int) | ^~~ Here is my program: #include<stdio.h> #include<stdlib.h> struct node{ int data; struct node *next; }*head=NULL,*temp,*new_node; void create(int); void display(int); void insert(int); void delp(int); void delv(int); void search(int); void reverse(int); int n; int main(){ int pos,op=1; while (op>=1 || op<8) { printf("\n1) Create the linked list."); printf("\n2) Display the linked list."); printf("\n3) Inesrt a node."); printf("\n4) Delete a node by position."); printf("\n5) Delete a node by value."); printf("\n6) Search data."); printf("\n7) Revers the linked list."); printf("\n8) Exit"); printf("Enter the choice : "); scanf("%d",&op); switch(op) { case 1 : if (head==NULL) printf("ERROR!! Linked list is already created!"); else printf("Enter how many nodes you want : "); scanf("%d",&n); create(n); } } } void create(int) { int i; for (i=0;i<n;i++) { new_node=(struct node *)malloc(sizeof(struct node)); printf("Enter the data : "); scanf("%d",&new_node->data); if (head==NULL) head=temp=new_node; else temp->next=new_node; temp=new_node; } }

Like "void created (int name_here)

Can you help me to write code of Diamond shape in c programming? Please

tcs codevita mario3 solution

Whats wrong with this code..if i input 30,000 the gross salary comes 48,000 but in online solution ans is 18,000 why they substrate

vec(m+1,0) mean empty vector of size m+1 ?

It is not an empty vector. It is a vector of size m+1 where all the elements are 0.

Plz suggest me a source for pointer and reference practice

#algorithm #rectangle_query #rtree #c++ Hello, I am doing a rectangular query on the rectangles given in the plane. Rectangles intersecting the query rectangle are returned at the end of the problem. I use Rtree. But I do not understand many things. Please help և give directions.

Means I had recently completed the theory of those topics and want a bunch of question

If you passed beginner level I suggest these 3 books: Effective C++, More Effective C++, Modern Effective C++ from Scott Meyers Then fluentcpp.com is a good resource for advanced reading. I don't have good suggestions for complete beginners, I was learning by shitty books, making mistakes and asking questions on toxic russian programming forums 😄 Try also this: