Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:11:15: error: invalid conversion from ‘int’ to ‘char*’ [-fpermissive] fgets(a,2*n,f); ^ In file included from user.cpp:1:0: /usr/include/stdio.h:604:14: error: initializing argument 1 of ‘char* fgets(char*, int, FILE*)’ [-fpermissive] extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream) ^ user.cpp:13:14: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(c[i]=' ') ^