printf a variable in C -

#include <stdio.h> #include <stdlib.h>  int main() {     int x = 1;      printf("please make selection keyboard\n");     sleep(1);     printf("1.\n");      char input;     scanf ("%c", &input);     switch (input) {         case '1':             x=x+1;             printf(x);     }      return(0); } 

i trying make variable add , print variable out can't seem code work.

my output error

newcode1.c: in function ‘main’: newcode1.c:20:2: warning: passing argument 1 of ‘printf’ makes pointer integer without cast [enabled default] in file included newcode1.c:1:0: /usr/include/stdio.h:362:12: note: expected ‘const char * __restrict__’ argument of type ‘int’ newcode1.c:20:2: warning: format not string literal , no format arguments [-wformat-security] 

your printf needs format string:

printf("%d\n", x); 

this reference page gives details on how use printf , related functions.