In file included from /in/database.c:4:0:
/in/persistence.h: In function 'loadTable':
/in/persistence.h:40:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(i=0;i<strlen(buff);i++){
                      ^
/in/persistence.h:43:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 if(buff[i]==' ' || i==strlen(buff)-1){
                                     ^~
/in/database.c: In function 'main':
/in/database.c:118:9: warning: implicit declaration of function 'gets'; did you mean 'fgets'? [-Wimplicit-function-declaration]
         gets(buff);
         ^~~~
         fgets
/tmp/ccS7hjsF.o: In function `main':
database.c:(.text.startup+0x36): warning: the `gets' function is dangerous and should not be used.