#include <stdio.h>
#include <string.h>
#include <stdlib.h>


void espace(char* ch,int n,int* res,char** adrch2){
int i,nbEspaces = 1,bInf,bSup;
char *ch2;

    for(i=0;i<strlen(ch);i++){
        if (nbEspaces == n){
            bSup = i;
        }
        if (ch[i] == ' '){
            nbEspaces++ ;
        }
    }
    i=bSup;
    while(i>0){
        i--;
        if (ch[i] == ' '){
            bInf = i;
            break;
        }
    }

    *res = nbEspaces <= n;

    ch2 = (char*) malloc((bSup-bInf+2)*sizeof(char));
    for (i=bInf;i<=strlen(ch);i++){
        ch2[i-bInf]=ch[i];
    }

    *adrch2 = ch2;

}
int main(){
    char ch[20] ;
    int n,res;
    int *pres = &res;
    char *ch2 = NULL;

    gets(ch);
    printf("\n donner n: ");
    scanf("%d",&n);

    espace(ch,n,pres,&ch2);
    res = *pres;
    printf("\nch2: %s;  res: %d",ch2,res);
}