Compilare: main.c: In function 'main': main.c:16:21: warning: format '%[^ ' expects argument of type 'char *', but argument 3 has type 'char * (*)[500]' [-Wformat=] fscanf(fptr,"%[^\n]", &c); ^ main.c:17:14: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char **' [-Wformat=] printf("%s", c); ^ main.c:19:26: warning: passing argument 1 of 'strlen' from incompatible pointer type [-Wincompatible-pointer-types] string_size = strlen(c); ^ In file included from main.c:2:0: /usr/include/string.h:394:15: note: expected 'const char *' but argument is of type 'char **' extern size_t strlen (const char *__s) ^~~~~~ main.c:30:17: warning: comparison between pointer and integer if((c[i]>='a' && c[i]<='z') || (c[i]>='A' && c[i]<='Z')){ ^~ main.c:30:30: warning: comparison between pointer and integer if((c[i]>='a' && c[i]<='z') || (c[i]>='A' && c[i]<='Z')){ ^~ main.c:30:45: warning: comparison between pointer and integer if((c[i]>='a' && c[i]<='z') || (c[i]>='A' && c[i]<='Z')){ ^~ main.c:30:58: warning: comparison between pointer and integer if((c[i]>='a' && c[i]<='z') || (c[i]>='A' && c[i]<='Z')){ ^~ main.c:16:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fptr,"%[^\n]", &c); ^~~~~~~~~~~~~~~~~~~~~~~~~