Untitled
unknown
c_cpp
4 years ago
856 B
6
Indexable
#include <stdlib.h> #include <ctype.h> #include <string.h> #include <stdio.h> long long unsigned int fact(int num); int chkdig(char string[]); int main(){ char a[50]={0}; while(1){ printf("Enter a number:"); scanf("%s",a); if(strcmp(a, "#") == 0){ break; } while(chkdig(a)!=1){ printf("Enter a valid number:"); scanf("%s",a); } int num = atoi(a); printf("%lld\n",fact(num)); } } int chkdig(char string[]){ int num=0; for (int i=0;i<strlen(string);i++){ if (isdigit(string[i])){ num+=1; } } if (num==strlen(string)){ return 1; } else{ return 0; } } long long unsigned int fact(int num){ if (num>=2){ return num*fact(num-1); } else{ return num; } }
Editor is loading...