int main(void) {
    // insert code here...
    int i, j ,k ;
    int tensu1[4][3],tensu2[3][4],tensu3[4][4];

    /*input the element of the matrix*/
    for ( i = 0; i < 4; i++ ) {
        for (j = 0; j < 3; j++){
            printf("请输入第一个矩阵第%d行第%d列的数： ", i+1 , j+1);
            scanf( "%d" , &tensu1[i][j]);
        }
    }

    for ( i = 0; i < 3; i++ ) {
        for (j = 0; j < 4; j++){
            printf("请输入第二个矩阵第%d行第%d列的数： ", i+1 , j+1);
            scanf( "%d" , &tensu2[i][j]);
        }
    }

    /*calculate the result */

    for ( i = 0; i < 4 ; i++ ) {
        for(j = 0; j < 4 ; j++) {
            for(k = 0; k < 3 ;k++)
                tensu3[i][j] = tensu1 [i][k] * tensu2 [k][i] + tensu3[i][j];
        }
    }
    /* show result */
    printf("The first matrix is：n");

    for ( i = 0 ; i < 4 ; i++ ) {
        putchar('|');
        for ( j = 0; j < 3; j++ ) {
            printf( "%4d" , tensu1[i][j] );
        }
        putchar('|');
        putchar('n');


    }

    printf("The second matrix is：n");

    for ( i = 0 ; i < 3 ; i++ ) {
        putchar('|');
        for ( j = 0; j < 4; j++ ) {
            printf( "%4d" , tensu1[i][j] );
        }
        putchar('|');
        putchar('n');


    }

    printf("The result of matrix is：n");

    for ( i = 0 ; i < 4 ; i++ ) {
        putchar('|');
        for ( j = 0; j < 4; j++ ) {
            printf( " %4d " , tensu3[i][j] );
        }
        putchar('|');
        putchar('n');


    }
    return 0;
}