Compilare: main.c: In function 'main': main.c:8:18: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[30000005]' [-Wformat=] fscanf(in, "%s %s", &a, &b); ^ main.c:8:21: warning: format '%s' expects argument of type 'char *', but argument 4 has type 'char (*)[3000005]' [-Wformat=] fscanf(in, "%s %s", &a, &b); ^ main.c:54:14: warning: assignment makes integer from pointer without a cast [-Wint-conversion] stiva[m] = NULL; ^ main.c:8:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%s %s", &a, &b); ^~~~~~~~~~~~~~~~~~~~~~~~~~~