Transpose of a matrix (SEGFAULT)

#include <stdio.h>
#include <stdlib.h>
/* SEGMENTATION FAULT after the createMat() function. Please help ;-;
    I don't know why that happens. I tried using pointer-to-pointer-to-pointer-to-integer
for the 2d array formal parameters (ex: func(int ***matrix)) and use &matrix for the
actual parameter and it works. I don't understand why it wouldn't work for "int **matrix" formal
parameter with "matrix" actual parameter */

void getRowCol(int *row, int *col){
    // Get Dimensions
    printf("Enter row-col: ");
    scanf("%d-%d", row, col);
}

void createMat(int **mat, int row, int col){
    // Allocate memory for a matrix
    int i;
    mat = (int **)malloc(sizeof(int *)*row);

    for(i=0; i<row; ++i){
        *(mat+i) = (int *)malloc(sizeof(int *)*col);
    }
}

void inputVal(int **mat, int row, int col){
    // Iterate through each cell and ask for input
    int i, j;
    for(i=0; i<row; ++i){
        for(j=0; j<col; ++j){
            printf("Enter value in A%d%d: ", i+1, j+1);
            scanf("%d", (*(mat+i)+j));
        }
    }
}

void showMat(int **mat, int row, int col){
    // Print the cells
    int i, j;
    for(i=0; i<row; ++i){
        for(j=0; j<col; ++j){
            printf(" %d ", *(*(mat+i)+j));
        }
        printf("\n");
    }
}

void transposeMat(int **mat, int **transpose, int row, int col){
    /* Iterate through each cell in initial matrix
    and put the value in the transposed cell*/
    int i, j;
    for(i=0; i<row; ++i){
        for(j=0; j<col; ++j){
            *(*(transpose+j)+i) = *(*(mat+i)+j);
        }
    }
}

void freeMat(int **mat, int row){
    // Free each allocated pointer to avoid memory leaks
    for(int i=0; i<row; ++i){
        free(*(mat+i));
    }
    free(mat);
}

int main(){
    int row, col, **matrix, **transpose;
    // Get Dimensions
    getRowCol(&row, &col);
    printf("Matrix is %d by %d\n", row, col);

    // Create Matrices
    createMat(matrix, row, col);
    createMat(transpose, col, row);

    // Get Values for the Initial Matrix
    inputVal(matrix, row, col);

    // Show Initial Matrix
    printf("Initial Matrix\n");
    showMat(matrix, row, col);

    // Transpose and Show
    printf("Transposed Matrix\n");
    transposeMat(matrix, transpose, row, col);
    showMat(transpose, col, row);

    freeMat(matrix, row);
    freeMat(transpose, col);
    return 0;
}