[dsd]

void xSeedRnd(int seed){
srand(seed);
}

double xRnd(double min, double max){
    double length=max-min;
    double var =((double) rand() / (double)RAND_MAX);
    double value=min+var*length;
return value;
}

int xRand(int min, int max){
    int length=max-min;
    double var =((double) rand() / (double)RAND_MAX);
    int value=min+var*length;
return value;
}

double xMod(double a,double b){
double c=a-b*floor(a/b);
return c;
}
double xAbs(double value){
if (value<0) {value=-value;}
return value;
}

Этих функций мне не хватало