void infixToPostfix(char *infix)
{
    char postfix[100], tokens[20][20], *temptok;
    int i = 0;
    temptok = strtok(infix, "+-*/() ");
    tokens[i++][20] = *temptok;
    while (temptok != NULL)
    {
        temptok = strtok(NULL, "+-*/() ");
        tokens[i++][20] = *temptok;
        printf("%s ", *temptok);
    }
}
int main()
{
    char infix[100] = "5+7+8+10*100";
    /*printf("Please enter the infix expression: ");
    gets(infix);*/
    infixToPostfix(infix);
    system("pause");
    return 0;
}

This code gives me a segmentation fault when i try to tokenize my string. What am i doing wrong?