Hàm đếm số ký tự

**Admin** Thu Apr 28, 2011 1:03 am

Code:: #include "stdio.h" #include "conio.h" #include "string.h" //------------------------------------------------------------ void nhapsl(char &ch,char st[100]) { printf("\n Nhap mot chuoi ky tu: "); fflush(stdin); gets(st); printf("\n Nhap mot ky tu: "); fflush(stdin); ch=getch(); } //------------------------------------------------------------ int demkytu(char ch,char st[100]) { int i,x,n; n=strlen(st); for(i=0,x=0;i<n;i++) { if (st[i]==ch) x++; } return x; } //------------------------------------------------------------ void inkq(char ch,char *st) { printf("\n Co %d ky tu %c duoc su dung trong chuoi ",demkytu(ch,st),ch); } //------------------------------------------------------------ void main() { char ch,st[100]; nhapsl(ch,st); inkq(ch,st); getch(); }