Rezumat problemă

Dublare1

C++

#1633

Să se scrie un subprogram C++ prin care se dublează prima cifră a unui număr natural n transmis ca parametru. Funcția întoarce rezultatul prin intermediul aceluiași parametru n.

Consola Sacuiu Silviu (silviu_s) ușoară

Clasa 10 Subprograme Subprograme care întorc valori prin parametri Cifrele unui număr

Rezolvă

Detalii

Problema	Dublare1	Operații I/O	tastatură/ecran
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64739516	Utilizator	Voicu David (David_Voicu12)
Fișier	dublare1.cpp	Dimensiune	240 B
Data încărcării	27 Mai 2026, 08:37	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

dublare1.cpp: In function ‘int dublarel(int)’:
dublare1.cpp:7:30: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    7 | int dublarel(int n) {int main()
      |                              ^~
dublare1.cpp:7:30: note: remove parentheses to default-initialize a variable
    7 | int dublarel(int n) {int main()
      |                              ^~
      |                              --
dublare1.cpp:7:30: note: or replace parentheses with braces to value-initialize a variable
dublare1.cpp:8:5: error: expected initializer before ‘int’
    8 |     int v[20],k=0,m,i,n;
      |     ^~~
dublare1.cpp:10:7: error: ‘m’ was not declared in this scope
   10 | while(m>0){ v[k]=m%10; m=m/10; k++;}
      |       ^
dublare1.cpp:10:13: error: ‘v’ was not declared in this scope
   10 | while(m>0){ v[k]=m%10; m=m/10; k++;}
      |             ^
dublare1.cpp:10:15: error: ‘k’ was not declared in this scope
   10 | while(m>0){ v[k]=m%10; m=m/10; k++;}
      |               ^
dublare1.cpp:11:14: error: ‘i’ was not declared in this scope
   11 |     n=0; for(i=k-1; i>=0; i--)
      |              ^
dublare1.cpp:11:16: error: ‘k’ was not declared in this scope
   11 |     n=0; for(i=k-1; i>=0; i--)
      |                ^
dublare1.cpp:12:10: error: ‘v’ was not declared in this scope
   12 | { n=n*10+v[i];
      |          ^
dublare1.cpp:13:2: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
   13 |  if(i==k-1)
      |  ^~
dublare1.cpp:15:6: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
   15 |      return 0; }
      |      ^~~~~~
dublare1.cpp:17:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   17 | int main()
      |         ^~
dublare1.cpp:17:9: note: remove parentheses to default-initialize a variable
   17 | int main()
      |         ^~
      |         --
dublare1.cpp:17:9: note: or replace parentheses with braces to value-initialize a variable
dublare1.cpp:18:1: error: a function-definition is not allowed here before ‘{’ token
   18 | {
      | ^
dublare1.cpp:24:2: error: expected ‘}’ at end of input
   24 | }
      |  ^
dublare1.cpp:7:21: note: to match this ‘{’
    7 | int dublarel(int n) {int main()
      |                     ^
dublare1.cpp:11:6: warning: control reaches end of non-void function [-Wreturn-type]
   11 |     n=0; for(i=k-1; i>=0; i--)
      |     ~^~

Cum funcționează evaluarea?