What is the problem with each of the following program codes?

void funct(int *pt) {

delete [] pt;

}

int main {

int *iptr = new int[100];

funct(iptr);

return 0;

}

char *funct() {

char *pt = new char[200];

return pt;

}

int main {

char *cptr = new char[100];

cptr = funct();

return 0;

}