Compilare: user.c:6:1: warning: return type defaults to ‘int’ [enabled by default] main(){ ^ user.c: In function ‘main’: user.c:31:5: warning: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration] memset(binar, 0, 17 * sizeof(char)); ^ user.c:31:5: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default] user.c:35:1: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration] int len = strlen(secventa); ^ user.c:35:11: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default] int len = strlen(secventa); ^ user.c:34:7: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(file1, "%s", secventa); ^