Eroare de compilare: user.c:1: warning: return type defaults to 'int' user.c: In function 'main': user.c:1: warning: implicit declaration of function 'fscanf' user.c:1: warning: incompatible implicit declaration of built-in function 'fscanf' user.c:1: warning: implicit declaration of function 'fopen' user.c:1: warning: passing argument 1 of 'fscanf' makes pointer from integer without a cast user.c:1: warning: implicit declaration of function 'fputs' user.c:1: warning: implicit declaration of function 'itoa' user.c:1:113: warning: no newline at end of file /tmp/ccgSk0NW.o: In function `main': user.c:(.text+0x64): undefined reference to `itoa' collect2: ld returned 1 exit status