Eroare de compilare: user.cpp:9:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main(){ ^ user.cpp: In function ‘int main()’: user.cpp:16:23: error: ‘strlen’ was not declared in this scope int i, j, m = strlen(s); ^ user.cpp:28:28: error: ‘a’ was not declared in this scope for(int j=0;j<k;j++)fout<<a[j]<<" "; ^