prog.c: In function 'main':
prog.c:8:16: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
for (i=0;i<strlen(A);i++)
^~~~~~
prog.c:8:16: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:16: note: include '<string.h>' or provide a declaration of 'strlen'
prog.c:15:61: warning: incompatible implicit declaration of built-in function 'strlen'
printf("digit:%d\nalphabet:%d\nother:%d",digit,alphabet,strlen(A)-digit-alphabet-1);
^~~~~~
prog.c:15:61: note: include '<string.h>' or provide a declaration of 'strlen'
prog.c:15:43: warning: format '%d' expects argument of type 'int', but argument 4 has type 'long unsigned int' [-Wformat=]
printf("digit:%d\nalphabet:%d\nother:%d",digit,alphabet,strlen(A)-digit-alphabet-1);
^