void MelangerBalles(char ch_balle[5], char ch_placeballe[5]){

    int j;

    for(int i=0; i<5; i++){
        do{
            j = rand()%5;
        }
        while(ch_placeballe[j]!=' ');
        ch_placeballe[j] = ch_balle[i];
    }
}