Compilare: user.c:3: warning: return type of 'main' is not 'int' user.c: In function 'main': user.c:7: warning: format '%d' expects type 'int *', but argument 3 has type 'int' user.c:7: warning: format '%d' expects type 'int *', but argument 4 has type 'int' user.c:12:3: warning: no newline at end of file user.c:7: warning: 'a' is used uninitialized in this function user.c:7: warning: 'b' is used uninitialized in this function