prog.c: In function ‘main’:
prog.c:5:6: error: conflicting types for ‘a’
int a=100,b=50,c=25;
^
prog.c:4:7: note: previous definition of ‘a’ was here
char a=10;
^
prog.c:5:17: warning: unused variable ‘c’ [-Wunused-variable]
int a=100,b=50,c=25;
^
prog.c:5:12: warning: unused variable ‘b’ [-Wunused-variable]
int a=100,b=50,c=25;
^