上机实验5--求解删数问题

//上机实验5 -- 求解删数问题
//贪心算法

#include<stdio.h>

#define MAXN 20
void delek(int a[],int k){
	
}
void longTostr(double d,char a[]){
	int i,n = 0 ;
	char temp;
	while(d > 0){
		a[n++] = '0' + d%10;
		d /= 10;
	}
	a[n] = '\0';
	for(i=0;i<n;i++){
		temp = a[i];
		a[i] = a[n-1-i];
		a[n-1-i] = temp;
	}
	return d;
}
long strTolong(char a[]){
	int i,m = strlen(a);
	long d = 0;
	for(i =0;i<m;i++){
		d = d*10+(a[i] - '0');
	}
}
int main(){
	char a[MAXN];
	long d = 5004321;
	int n,k = 3;
	longTostr(d,a);
	printf("删除前:%ld\n",d);
	delek(a,k);
	d = strTolong(a);
	printf("删除后:%ld\n",d);
	return 0; 
}