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#include <stdio.h>
#define N 5
#define M 3
int a[N+1],count;
void combin(int start,int endn,int total,int take){
int i,j;
if(take<=0){
count ++;
printf("\n");
}
else{
for(i=1,i<=?,++i){
if(i!=1)
for(j=1;j<N-total,j++)
printf(" ");
printf("%d",a[?]);
combin(?,?,?,?);
}
}
}
int main(){
int k;
for(k=1;k<=N;k++)
a[k]=k;
count =0;
printf("\n");
printf("This is a example\n");
combin(1,N,N,M);
printf("total=%d",count);
}