Eroare de compilare: user.c: In function ‘sec3’: user.c:16: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:16: note: use option -std=c99 or -std=gnu99 to compile your code user.c: In function ‘main’: user.c:30: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:35: error: redefinition of ‘i’ user.c:30: note: previous definition of ‘i’ was here user.c:35: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:47: warning: format ‘%lu’ expects type ‘long unsigned int’, but argument 3 has type ‘long long unsigned int’ user.c:27: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:28: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:31: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result