prog.c: In function 'main':
prog.c:10:9: warning: passing argument 1 of 'printf' makes pointer from integer without a cast [-Wint-conversion]
printf(suma)
^
In file included from prog.c:1:0:
/usr/include/stdio.h:362:12: note: expected 'const char * restrict' but argument is of type 'int'
extern int printf (const char *__restrict __format, ...);
^
prog.c:11:2: error: expected ';' before 'return'
return 0;
^
prog.c:8:8: warning: unused variable 'pi' [-Wunused-variable]
float pi;
^