Compilare: user.c: In function ‘main’: user.c:24:4: warning: implicit declaration of function ‘isdigit’ [-Wimplicit-function-declaration] if(linie[i]=='"' || isdigit(linie[i])!=0) ^ user.c:80:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(linie[i]=='"' || isdigit(linie[i])!=0) ^ user.c:15:8: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(linie,1024,f); ^ user.c:69:9: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(linie,1024,h); ^