Eroare de compilare: user.c: In function ‘gcd’: user.c:4:3: error: ‘retrun’ undeclared (first use in this function) retrun a; ^ user.c:4:3: note: each undeclared identifier is reported only once for each function it appears in user.c:4:10: error: expected ‘;’ before ‘a’ retrun a; ^ user.c:5:10: warning: left-hand operand of comma expression has no effect [-Wunused-value] return(b,a mod b); ^ user.c:5:13: error: expected ‘)’ before ‘mod’ return(b,a mod b); ^ user.c: In function ‘main’: user.c:12:2: warning: implicit declaration of function ‘scanf’ [-Wimplicit-function-declaration] scanf("%d",&n); ^ user.c:12:2: warning: incompatible implicit declaration of built-in function ‘scanf’ [enabled by default] user.c:16:3: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration] printf("%d\n",gcd(a,b)); ^ user.c:16:3: warning: incompatible implicit declaration of built-in function ‘printf’ [enabled by default]