Eroare de compilare: user.c: In function ‘main’: user.c:41:18: warning: unknown escape sequence: '\N' [enabled by default] fprintf(fp_w,"%d\N",-1); ^ user.c:45:18: warning: unknown escape sequence: '\N' [enabled by default] fprintf(fp_w,"%s\N",aN); ^ user.c:56:5: warning: implicit declaration of function ‘itoa’ [-Wimplicit-function-declaration] aP=itoa(c*P+N); ^ user.c:56:7: warning: assignment makes pointer from integer without a cast [enabled by default] aP=itoa(c*P+N); ^ user.c:60:68: error: expected expression before ‘||’ token if((*(aN+i)-'0'!='2')||(*(aN+i)-'0'!='3')||(*(aN+i)-'0')!='5')||(*(aN+i)-'0'!='7')) ^ user.c:60:88: error: expected statement before ‘)’ token if((*(aN+i)-'0'!='2')||(*(aN+i)-'0'!='3')||(*(aN+i)-'0')!='5')||(*(aN+i)-'0'!='7')) ^ user.c:63:19: warning: unknown escape sequence: '\N' [enabled by default] fprintf(fp_w,"%s\N",aN); ^